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data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Top)</div> </a> </li> <li id="toc-History" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#History"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>History</span> </div> </a> <button aria-controls="toc-History-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle History subsection</span> </button> <ul id="toc-History-sublist" class="vector-toc-list"> <li id="toc-1980s:_Motivation" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#1980s:_Motivation"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>1980s: Motivation</span> </div> </a> <ul id="toc-1980s:_Motivation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-1988:_POSIX" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#1988:_POSIX"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>1988: POSIX</span> </div> </a> <ul id="toc-1988:_POSIX-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-1980s_and_1990s:_X/Open_Portability_Guide" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#1980s_and_1990s:_X/Open_Portability_Guide"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.3</span> <span>1980s and 1990s: X/Open Portability Guide</span> </div> </a> <ul id="toc-1980s_and_1990s:_X/Open_Portability_Guide-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-1990s:_Spec_1170" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#1990s:_Spec_1170"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.4</span> <span>1990s: Spec 1170</span> </div> </a> <ul id="toc-1990s:_Spec_1170-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-1994:_Single_UNIX_Specification" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#1994:_Single_UNIX_Specification"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.5</span> <span>1994: Single UNIX Specification</span> </div> </a> <ul id="toc-1994:_Single_UNIX_Specification-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-1997:_Single_UNIX_Specification,_version_2" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#1997:_Single_UNIX_Specification,_version_2"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.6</span> <span>1997: Single UNIX Specification, version 2</span> </div> </a> <ul id="toc-1997:_Single_UNIX_Specification,_version_2-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-2001:_Single_UNIX_Specification,_version_3,_POSIX.1-2001" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#2001:_Single_UNIX_Specification,_version_3,_POSIX.1-2001"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.7</span> <span>2001: Single UNIX Specification, version 3, POSIX.1-2001</span> </div> </a> <ul id="toc-2001:_Single_UNIX_Specification,_version_3,_POSIX.1-2001-sublist" class="vector-toc-list"> <li id="toc-2004_Edition" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#2004_Edition"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.7.1</span> <span>2004 Edition</span> </div> </a> <ul id="toc-2004_Edition-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-2008:_Single_UNIX_Specification,_version_4,_POSIX.1-2008" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#2008:_Single_UNIX_Specification,_version_4,_POSIX.1-2008"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.8</span> <span>2008: Single UNIX Specification, version 4, POSIX.1-2008</span> </div> </a> <ul id="toc-2008:_Single_UNIX_Specification,_version_4,_POSIX.1-2008-sublist" class="vector-toc-list"> <li id="toc-2013_Edition" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#2013_Edition"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.8.1</span> <span>2013 Edition</span> </div> </a> <ul id="toc-2013_Edition-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-2016_Edition" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#2016_Edition"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.8.2</span> <span>2016 Edition</span> </div> </a> <ul id="toc-2016_Edition-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-2018_Edition,_POSIX.1-2017" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#2018_Edition,_POSIX.1-2017"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.8.3</span> <span>2018 Edition, POSIX.1-2017</span> </div> </a> <ul id="toc-2018_Edition,_POSIX.1-2017-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> </ul> </li> <li id="toc-Specification" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Specification"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Specification</span> </div> </a> <ul id="toc-Specification-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Marks_for_compliant_systems" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Marks_for_compliant_systems"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Marks for compliant systems</span> </div> </a> <ul id="toc-Marks_for_compliant_systems-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Compliance" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Compliance"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Compliance</span> </div> </a> <button aria-controls="toc-Compliance-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Compliance subsection</span> </button> <ul id="toc-Compliance-sublist" class="vector-toc-list"> <li id="toc-Currently_registered_UNIX_systems" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Currently_registered_UNIX_systems"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Currently registered UNIX systems</span> </div> </a> <ul id="toc-Currently_registered_UNIX_systems-sublist" class="vector-toc-list"> <li id="toc-AIX" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#AIX"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1.1</span> <span>AIX</span> </div> </a> <ul id="toc-AIX-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-HP-UX" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#HP-UX"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1.2</span> <span>HP-UX</span> </div> </a> <ul id="toc-HP-UX-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-macOS" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#macOS"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1.3</span> <span>macOS</span> </div> </a> <ul id="toc-macOS-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Xinuos" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Xinuos"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1.4</span> <span>Xinuos</span> </div> </a> <ul id="toc-Xinuos-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-z/OS" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#z/OS"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1.5</span> <span>z/OS</span> </div> </a> <ul id="toc-z/OS-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Previously_registered_UNIX_systems" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Previously_registered_UNIX_systems"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2</span> <span>Previously registered UNIX systems</span> </div> </a> <ul id="toc-Previously_registered_UNIX_systems-sublist" class="vector-toc-list"> <li id="toc-EulerOS" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#EulerOS"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2.1</span> <span>EulerOS</span> </div> </a> <ul id="toc-EulerOS-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-FTX" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#FTX"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2.2</span> <span>FTX</span> </div> </a> <ul id="toc-FTX-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Inspur_K-UX" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Inspur_K-UX"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2.3</span> <span>Inspur K-UX</span> </div> </a> <ul id="toc-Inspur_K-UX-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-IRIX" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#IRIX"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2.4</span> <span>IRIX</span> </div> </a> <ul id="toc-IRIX-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-OS/390" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#OS/390"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2.5</span> <span>OS/390</span> </div> </a> <ul id="toc-OS/390-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Reliant_UNIX" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Reliant_UNIX"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2.6</span> <span>Reliant UNIX</span> </div> </a> <ul id="toc-Reliant_UNIX-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Solaris" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Solaris"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2.7</span> <span>Solaris</span> </div> </a> <ul id="toc-Solaris-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Tru64_UNIX" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Tru64_UNIX"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2.8</span> <span>Tru64 UNIX</span> </div> </a> <ul id="toc-Tru64_UNIX-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Other" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Other"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2.9</span> <span>Other</span> </div> </a> <ul id="toc-Other-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Non-registered_Unix-like_systems" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Non-registered_Unix-like_systems"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.3</span> <span>Non-registered Unix-like systems</span> </div> </a> <ul id="toc-Non-registered_Unix-like_systems-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" 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class="mw-page-title-main">Single UNIX Specification</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. 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class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Single_UNIX_Specification" title="Single UNIX Specification – Czech" lang="cs" hreflang="cs" data-title="Single UNIX Specification" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Single_UNIX_Specification" title="Single UNIX Specification – German" lang="de" hreflang="de" data-title="Single UNIX Specification" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Single_Unix_Specification" title="Single Unix Specification – Spanish" lang="es" hreflang="es" data-title="Single Unix Specification" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Single_UNIX_Specification" title="Single UNIX Specification – French" lang="fr" hreflang="fr" data-title="Single UNIX Specification" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%8B%A8%EC%9D%BC_%EC%9C%A0%EB%8B%89%EC%8A%A4_%EA%B7%9C%EA%B2%A9" title="단일 유닉스 규격 – Korean" lang="ko" hreflang="ko" data-title="단일 유닉스 규격" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Single_UNIX_Specification" title="Single UNIX Specification – Italian" lang="it" hreflang="it" data-title="Single UNIX Specification" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Single_UNIX_Specification" title="Single UNIX Specification – Dutch" lang="nl" hreflang="nl" data-title="Single UNIX Specification" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Single_UNIX_Specification" title="Single UNIX Specification – Japanese" lang="ja" hreflang="ja" data-title="Single UNIX Specification" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Single_UNIX_Specification" title="Single UNIX Specification – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Single UNIX Specification" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Single_UNIX_Specification" title="Single UNIX Specification – Polish" lang="pl" hreflang="pl" data-title="Single UNIX Specification" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Single_UNIX_Specification" title="Single UNIX Specification – Portuguese" lang="pt" hreflang="pt" data-title="Single UNIX Specification" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/Single_UNIX_Specification" title="Single UNIX Specification – Russian" lang="ru" hreflang="ru" data-title="Single UNIX Specification" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Single_UNIX_Specification" title="Single UNIX Specification – Slovak" lang="sk" hreflang="sk" data-title="Single UNIX Specification" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Single_UNIX_Specification" title="Single UNIX Specification – Finnish" lang="fi" hreflang="fi" data-title="Single UNIX Specification" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/Single_UNIX_Specification" title="Single UNIX Specification – Ukrainian" lang="uk" hreflang="uk" data-title="Single UNIX Specification" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%96%AE%E4%B8%80UNIX%E8%A6%8F%E7%AF%84" title="單一UNIX規範 – Chinese" lang="zh" hreflang="zh" data-title="單一UNIX規範" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a 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dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Standards for operating systems for using the UNIX trademark</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">"Unix V7" and "UNIX V7" redirect here. For the 1979 Research Unix release often called V7, see <a href="/wiki/Version_7_Unix" title="Version 7 Unix">Version 7 Unix</a>.</div> <p> The <b>Single UNIX Specification</b> (<b>SUS</b>) is a standard for <a href="/wiki/Computer" title="Computer">computer</a> <a href="/wiki/Operating_system" title="Operating system">operating systems</a>,<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> compliance with which is required to qualify for using the "<a href="/wiki/Unix" title="Unix">UNIX</a>" trademark. The standard specifies programming interfaces for the C language, a command-line shell, and user commands. The core specifications of the SUS known as <i>Base Specifications</i> are developed and maintained by the <a href="/wiki/Austin_Group" title="Austin Group">Austin Group</a>, which is a joint working group of <a href="/wiki/IEEE" class="mw-redirect" title="IEEE">IEEE</a>, <a href="/wiki/ISO/IEC_JTC_1/SC_22" title="ISO/IEC JTC 1/SC 22">ISO/IEC JTC 1/SC 22</a>/WG 15 and <a href="/wiki/The_Open_Group" title="The Open Group">The Open Group</a>. If an operating system is submitted to The Open Group for certification and passes conformance tests, then it is deemed to be compliant with a UNIX standard such as UNIX 98 or UNIX 03. </p><p>Very few <a href="/wiki/BSD" class="mw-redirect" title="BSD">BSD</a> and <a href="/wiki/Linux" title="Linux">Linux</a>-based operating systems are submitted for compliance with the Single UNIX Specification, although system developers generally aim for compliance with <a href="/wiki/POSIX" title="POSIX">POSIX</a> standards, which form the core of the Single UNIX Specification. </p><p>The latest SUS consists of two parts: the <i>base specifications</i> technically identical to POSIX, and the X/Open Curses specification.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>Some parts of the SUS are optional. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="1980s:_Motivation">1980s: Motivation</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=2" title="Edit section: 1980s: Motivation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The SUS emerged from multiple 1980s efforts to standardize <a href="/wiki/Operating_system" title="Operating system">operating system</a> <a href="/wiki/Interface_(computer_science)" class="mw-redirect" title="Interface (computer science)">interfaces</a> for software designed for variants of the Unix operating system. The need for standardization arose because enterprises using computers wanted to be able to develop programs that could be used on the computer systems of different manufacturers without reimplementing the programs. Unix was selected as the basis for a standard system interface partly because it was manufacturer-neutral. </p><p>In 1984, the UNIX user group called /usr/group published the results of their standardization effort for programming interfaces in their 1984 /usr/group standard, which became basis for what would become the POSIX.1-1988 standard.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>In 1985, AT&T published <a href="/wiki/System_V_Interface_Definition" title="System V Interface Definition">System V Interface Definition</a> (SVID), a specification of UNIX System V programming interfaces.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="1988:_POSIX">1988: POSIX</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=3" title="Edit section: 1988: POSIX"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In 1988, standardization efforts resulted in <b>IEEE 1003</b> (also registered as <b><a href="/wiki/International_Organization_for_Standardization" title="International Organization for Standardization">ISO</a>/<a href="/wiki/International_Electrotechnical_Commission" title="International Electrotechnical Commission">IEC</a> 9945</b>), or <b><a href="/wiki/POSIX" title="POSIX">POSIX</a>.1-1988</b>, which loosely stands for <b>Portable Operating System Interface</b>. </p> <div class="mw-heading mw-heading3"><h3 id="1980s_and_1990s:_X/Open_Portability_Guide"><span id="1980s_and_1990s:_X.2FOpen_Portability_Guide"></span>1980s and 1990s: X/Open Portability Guide</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=4" title="Edit section: 1980s and 1990s: X/Open Portability Guide"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <a href="/wiki/X/Open_Portability_Guide" class="mw-redirect" title="X/Open Portability Guide">X/Open Portability Guide</a> (XPG) was a precursor to the SUS, published by the <a href="/wiki/X/Open_Company" class="mw-redirect" title="X/Open Company">X/Open Company</a>, a consortium of companies established in 1984. The guides were published in the following years. </p> <ul><li>XPG1: X/Open Portability Guide Issue 1: 1985<sup id="cite_ref-raymond2003_7-0" class="reference"><a href="#cite_note-raymond2003-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup></li> <li>XPG2: X/Open Portability Guide Issue 2: 1987<sup id="cite_ref-raymond2003_7-1" class="reference"><a href="#cite_note-raymond2003-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup></li> <li>XPG3: X/Open Portability Guide Issue 3: 1989<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup></li> <li>XPG4: X/Open Portability Guide Issue 4: 1992<sup id="cite_ref-raymond2003_7-2" class="reference"><a href="#cite_note-raymond2003-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup></li></ul> <p>XPG4 Base included the following documents: </p> <ul><li>System Interface Definitions, Issue 4, <style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/1-872630-46-4" title="Special:BookSources/1-872630-46-4">1-872630-46-4</a></li> <li>System Interfaces and Headers, Issue 4, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/1-872630-47-2" title="Special:BookSources/1-872630-47-2">1-872630-47-2</a></li> <li>Commands and Utilities, Issue 4, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/1-872630-48-0" title="Special:BookSources/1-872630-48-0">1-872630-48-0</a></li></ul> <div class="mw-heading mw-heading3"><h3 id="1990s:_Spec_1170">1990s: Spec 1170</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=5" title="Edit section: 1990s: Spec 1170"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In the early 1990s, a separate effort known as the Common API Specification or Spec 1170 was initiated by several major vendors,<sup id="cite_ref-unixorgsus_9-0" class="reference"><a href="#cite_note-unixorgsus-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> who formed the <a href="/wiki/Common_Open_Software_Environment" title="Common Open Software Environment">COSE</a> alliance in the wake of the <a href="/wiki/Unix_wars" title="Unix wars">Unix wars</a>. In 1993, Spec 1170 was assigned by COSE to <a href="/wiki/X/Open" title="X/Open">X/Open</a> for fasttrack.<sup id="cite_ref-unixorghist_10-0" class="reference"><a href="#cite_note-unixorghist-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> In October 1993, a planned transfer of UNIX trademark from Novell to X/Open was announced;<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> it was finalized in 2nd quarter of 1994.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> Spec 1170 would eventually become the Single Unix Specification.<sup id="cite_ref-unixorgsus_9-1" class="reference"><a href="#cite_note-unixorgsus-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="1994:_Single_UNIX_Specification">1994: Single UNIX Specification</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=6" title="Edit section: 1994: Single UNIX Specification"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In 1994, the X/Open Company released the <b>Single UNIX Specification</b>.<sup id="cite_ref-unixorgsus_9-2" class="reference"><a href="#cite_note-unixorgsus-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> The SUS was made up of documents that were part of the X/Open Common Applications Environment (CAE):<sup id="cite_ref-unixorgsus_9-3" class="reference"><a href="#cite_note-unixorgsus-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p> <ul><li>System Interface Definitions, Issue 4, Version 2<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup></li> <li>System Interfaces and Headers, Issue 4, Version 2<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup></li> <li>Commands and Utilities, Issue 4, Version 2<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup></li> <li>Networking Services, Issue 4<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup></li></ul> <p>This was a repackaging of the <a href="/wiki/X/Open_Portability_Guide" class="mw-redirect" title="X/Open Portability Guide">X/Open Portability Guide</a> (XPG), Issue 4, Version 2. </p><p>Sources differ on whether X/Open Curses, Issue 4, Version 2 was part of this SUS;<sup id="cite_ref-unixorgsus_9-4" class="reference"><a href="#cite_note-unixorgsus-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> its copyright date is given as 1996.<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> X/Open Curses, Issue 4 was published in 1995.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> </p><p>In October 1994, X/Open indicated they were going to refer to Spec 1170 as '"Single-Unix" specification'.<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </p><p>The SUS was at the core of the UNIX 95 brand.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> </p><p>This version had 1168 programming interfaces.<sup id="cite_ref-v3howmanyapis_22-0" class="reference"><a href="#cite_note-v3howmanyapis-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> </p><p>This version of SUS was drawn from the following sources:<sup id="cite_ref-unixorgsus_9-5" class="reference"><a href="#cite_note-unixorgsus-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p> <ul><li>XPG4 Base by X/Open</li> <li><a href="/wiki/System_V_Interface_Definition" title="System V Interface Definition">System V Interface Definition</a>, (SVID) Edition 3, Level 1 calls by AT&T</li> <li>Application Environment Specification (AES) by the <a href="/wiki/Open_Software_Foundation" title="Open Software Foundation">Open Software Foundation</a> (OSF)</li> <li>Interfaces found in common use and not yet covered by a formal specification, drawn from a survey of major applications.</li></ul> <div class="mw-heading mw-heading3"><h3 id="1997:_Single_UNIX_Specification,_version_2"><span id="1997:_Single_UNIX_Specification.2C_version_2"></span>1997: Single UNIX Specification, version 2</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=7" title="Edit section: 1997: Single UNIX Specification, version 2"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In 1996, X/Open merged with <a href="/wiki/Open_Software_Foundation" title="Open Software Foundation">Open Software Foundation</a> (OSF) to form <a href="/wiki/The_Open_Group" title="The Open Group">The Open Group</a>.<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> </p><p>In 1997, the Open Group released the <b>Single UNIX Specification, Version 2</b>.<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> </p><p>This specification consisted of:<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> </p> <ul><li>System Interface Definitions, Issue 5,<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup></li> <li>System Interfaces and Headers, Issue 5,<sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup></li> <li>Commands and Utilities, Issue 5,<sup id="cite_ref-30" class="reference"><a href="#cite_note-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup></li> <li>Networking Services, Issue 5,<sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup></li> <li>X/Open Curses, Issue 4, Version 2,<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup></li></ul> <p>and was at the core of the UNIX 98 brand.<sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup> </p><p>This version had 1434 programming interfaces.<sup id="cite_ref-v3howmanyapis_22-1" class="reference"><a href="#cite_note-v3howmanyapis-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="2001:_Single_UNIX_Specification,_version_3,_POSIX.1-2001"><span id="2001:_Single_UNIX_Specification.2C_version_3.2C_POSIX.1-2001"></span>2001: Single UNIX Specification, version 3, POSIX.1-2001</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=8" title="Edit section: 2001: Single UNIX Specification, version 3, POSIX.1-2001"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Beginning in 1998, a joint <a href="/wiki/Working_group" title="Working group">working group</a> of IEEE, ISO JTC 1 SC22 and The Open Group known as the <a href="/wiki/Austin_Group" title="Austin Group">Austin Group</a> began to develop the combined standard that would be known as the core of <b>Single UNIX Specification, Version 3</b> and as POSIX.1-2001. It was released on January 30, 2002.<sup id="cite_ref-34" class="reference"><a href="#cite_note-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> </p><p>This SUS consisted of:<sup id="cite_ref-unixorgv3_35-0" class="reference"><a href="#cite_note-unixorgv3-35"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> </p> <ul><li>Base Specifications, Issue 6 <ul><li>Base Definitions, Issue 6</li> <li>System Interfaces, Issue 6</li> <li>Shell and Utilities, Issue 6</li> <li>Rationale (Informative)</li></ul></li> <li>X/Open Curses, Issue 4, Version 2</li></ul> <p>and is at the core of the UNIX 03 brand.<sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup> </p><p>The Base Specifications are technically identical to <b>POSIX.1-2001</b>, which is IEEE Std 1003.1-2001.<sup id="cite_ref-unixorgv3_35-1" class="reference"><a href="#cite_note-unixorgv3-35"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> </p><p>This version had 1742 programming interfaces.<sup id="cite_ref-v3howmanyapis_22-2" class="reference"><a href="#cite_note-v3howmanyapis-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> </p><p>An authorized guide is available for the version.<sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="2004_Edition">2004 Edition</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=9" title="Edit section: 2004 Edition"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In 2004, a new edition of the POSIX.1-2001 standard was released, incorporating two technical corrigenda.<sup id="cite_ref-38" class="reference"><a href="#cite_note-38"><span class="cite-bracket">[</span>38<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-posix2004_39-0" class="reference"><a href="#cite_note-posix2004-39"><span class="cite-bracket">[</span>39<span class="cite-bracket">]</span></a></sup> It is called IEEE Std 1003.1, 2004 Edition.<sup id="cite_ref-posix2004_39-1" class="reference"><a href="#cite_note-posix2004-39"><span class="cite-bracket">[</span>39<span class="cite-bracket">]</span></a></sup> Some informally call it POSIX.1-2004,<sup id="cite_ref-40" class="reference"><a href="#cite_note-40"><span class="cite-bracket">[</span>40<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-41" class="reference"><a href="#cite_note-41"><span class="cite-bracket">[</span>41<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-42" class="reference"><a href="#cite_note-42"><span class="cite-bracket">[</span>42<span class="cite-bracket">]</span></a></sup> but this is not an official identification. </p> <div class="mw-heading mw-heading3"><h3 id="2008:_Single_UNIX_Specification,_version_4,_POSIX.1-2008"><span id="2008:_Single_UNIX_Specification.2C_version_4.2C_POSIX.1-2008"></span>2008: Single UNIX Specification, version 4, POSIX.1-2008</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=10" title="Edit section: 2008: Single UNIX Specification, version 4, POSIX.1-2008"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In December 2008, the <a href="/wiki/Austin_Group" title="Austin Group">Austin Group</a> published a new major revision of SUS and POSIX.<sup id="cite_ref-43" class="reference"><a href="#cite_note-43"><span class="cite-bracket">[</span>43<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-44" class="reference"><a href="#cite_note-44"><span class="cite-bracket">[</span>44<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-45" class="reference"><a href="#cite_note-45"><span class="cite-bracket">[</span>45<span class="cite-bracket">]</span></a></sup> This is the Single UNIX Specification, Version 4 (SUSv4).<sup id="cite_ref-46" class="reference"><a href="#cite_note-46"><span class="cite-bracket">[</span>46<span class="cite-bracket">]</span></a></sup> </p><p>This SUS consists of:<sup id="cite_ref-unixorgv4_47-0" class="reference"><a href="#cite_note-unixorgv4-47"><span class="cite-bracket">[</span>47<span class="cite-bracket">]</span></a></sup> </p> <ul><li>Base Specifications, Issue 7 <ul><li>Base Definitions, Issue 7</li> <li>System Interfaces, Issue 7</li> <li>Shell and Utilities, Issue 7</li> <li>Rationale, Issue 7, (Informative)</li></ul></li> <li>X/Open Curses, Issue 7</li></ul> <p>The Base Specifications are technically identical to <b>POSIX.1-2008</b>, which is IEEE Std 1003.1-2008.<sup id="cite_ref-unixorgv4_47-1" class="reference"><a href="#cite_note-unixorgv4-47"><span class="cite-bracket">[</span>47<span class="cite-bracket">]</span></a></sup> </p><p>This version had 1833 interfaces, of which 1191 were in the System Interfaces section.<sup id="cite_ref-48" class="reference"><a href="#cite_note-48"><span class="cite-bracket">[</span>48<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="2013_Edition">2013 Edition</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=11" title="Edit section: 2013 Edition"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Technical Corrigendum 1 mostly targeted internationalization, and also introduced a role-based access model. A trademark <i>UNIX V7</i> (not to be confused with <a href="/wiki/Version_7_Unix" title="Version 7 Unix">V7 UNIX</a>, the version of <a href="/wiki/Research_Unix" title="Research Unix">Research Unix</a> from 1979) was created to mark compliance with SUS Version 4.<sup id="cite_ref-49" class="reference"><a href="#cite_note-49"><span class="cite-bracket">[</span>49<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="2016_Edition">2016 Edition</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=12" title="Edit section: 2016 Edition"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Technical Corrigendum 2 was published in September 2016, leading into <i>IEEE Std 1003.1-2008, 2016 Edition</i> and <i>Single UNIX Specification, Version 4, 2016 Edition</i>. </p> <div class="mw-heading mw-heading4"><h4 id="2018_Edition,_POSIX.1-2017"><span id="2018_Edition.2C_POSIX.1-2017"></span>2018 Edition, POSIX.1-2017</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=13" title="Edit section: 2018 Edition, POSIX.1-2017"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In January 2018, an "administrative rollup" edition was released. It incorporates Single UNIX Specification version 4 TC1 and TC2, and is technically identical to the 2016 edition.<sup id="cite_ref-50" class="reference"><a href="#cite_note-50"><span class="cite-bracket">[</span>50<span class="cite-bracket">]</span></a></sup> </p><p>The Base Specifications are technically identical to <b>POSIX.1-2017</b>, which is IEEE Std 1003.1-2017.<sup id="cite_ref-51" class="reference"><a href="#cite_note-51"><span class="cite-bracket">[</span>51<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Specification">Specification</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=14" title="Edit section: Specification"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>SUSv3 totals some 3700 pages, which are divided into four main parts: </p> <ul><li><b>Base Definitions (XBD)</b> - a list of definitions and conventions used in the specifications and a list of <a href="/wiki/C_header_file" class="mw-redirect" title="C header file">C header files</a> which must be provided by compliant systems. 84 header files in total are provided.</li> <li><b>Shell and Utilities (XCU)</b> - a list of utilities and a description of the shell, <a href="/wiki/Bourne_shell" title="Bourne shell">sh</a>. 160 utilities in total are specified.</li> <li><b>System Interfaces (XSH)</b> - contains the specification of various functions which are implemented as <a href="/wiki/System_call" title="System call">system calls</a> or <a href="/wiki/Library_(computing)" title="Library (computing)">library</a> functions. 1123 system interfaces in total are specified.</li> <li><b>Rationale (XRAT)</b> - the explanation behind the standard.</li></ul> <p>The standard user command line and scripting interface is the <a href="/wiki/POSIX" title="POSIX">POSIX</a> shell, an extension of the <a href="/wiki/Bourne_Shell" class="mw-redirect" title="Bourne Shell">Bourne Shell</a> based on an early version of the <a href="/wiki/Korn_Shell" class="mw-redirect" title="Korn Shell">Korn Shell</a>. Other user-level programs, services and utilities include <a href="/wiki/AWK" title="AWK">awk</a>, <a href="/wiki/Echo_(command)" title="Echo (command)">echo</a>, <a href="/wiki/Ed_(text_editor)" class="mw-redirect" title="Ed (text editor)">ed</a>, <a href="/wiki/Vi_(text_editor)" title="Vi (text editor)">vi</a>, and hundreds of others. Required program-level services include basic <a href="/wiki/Input/output" title="Input/output">I/O</a> (<a href="/wiki/Computer_file" title="Computer file">file</a>, <a href="/wiki/Computer_terminal" title="Computer terminal">terminal</a>, and <a href="/wiki/Computer_network" title="Computer network">network</a>) services. A test suite accompanies the standard. It is called <b>PCTS</b> or the <b>POSIX Certification Test Suite</b>. </p><p>Additionally, SUS includes <a href="/wiki/Curses_(programming_library)" title="Curses (programming library)">CURSES</a> (XCURSES) specification, which specifies 372 functions and 3 header files. All in all, SUSv3 specifies 1742 interfaces. </p><p>Note that a system need not include <a href="/wiki/Source_code" title="Source code">source code</a> derived in any way from AT&T Unix to meet the specification. For instance, <a href="/wiki/IBM" title="IBM">IBM</a> <a href="/wiki/OS/390" title="OS/390">OS/390</a>, now <a href="/wiki/Z/OS" title="Z/OS">z/OS</a>, qualifies as UNIX despite having no code in common.<sup id="cite_ref-52" class="reference"><a href="#cite_note-52"><span class="cite-bracket">[</span>52<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Marks_for_compliant_systems">Marks for compliant systems</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=15" title="Edit section: Marks for compliant systems"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>There are five official marks for conforming systems:<sup id="cite_ref-53" class="reference"><a href="#cite_note-53"><span class="cite-bracket">[</span>53<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-54" class="reference"><a href="#cite_note-54"><span class="cite-bracket">[</span>54<span class="cite-bracket">]</span></a></sup> </p> <ul><li>UNIX 93<sup id="cite_ref-UNIX_93_55-0" class="reference"><a href="#cite_note-UNIX_93-55"><span class="cite-bracket">[</span>55<span class="cite-bracket">]</span></a></sup></li> <li>UNIX 95 - the mark for systems conforming to version 1 of the SUS<sup id="cite_ref-UNIX_95_56-0" class="reference"><a href="#cite_note-UNIX_95-56"><span class="cite-bracket">[</span>56<span class="cite-bracket">]</span></a></sup></li> <li>UNIX 98 - the mark for systems conforming to version 2 of the SUS<sup id="cite_ref-UNIX_98_57-0" class="reference"><a href="#cite_note-UNIX_98-57"><span class="cite-bracket">[</span>57<span class="cite-bracket">]</span></a></sup></li> <li>UNIX 03 - the mark for systems conforming to version 3 of the SUS<sup id="cite_ref-UNIX_03_58-0" class="reference"><a href="#cite_note-UNIX_03-58"><span class="cite-bracket">[</span>58<span class="cite-bracket">]</span></a></sup></li> <li>UNIX V7 - the mark for systems conforming to version 4 of the SUS (including Corrigenda)<sup id="cite_ref-UNIX_V7_59-0" class="reference"><a href="#cite_note-UNIX_V7-59"><span class="cite-bracket">[</span>59<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-60" class="reference"><a href="#cite_note-60"><span class="cite-bracket">[</span>60<span class="cite-bracket">]</span></a></sup></li></ul> <div class="mw-heading mw-heading2"><h2 id="Compliance">Compliance</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=16" title="Edit section: Compliance"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable sortable"> <tbody><tr> <th>Product </th> <th>Vendor </th> <th>Architecture </th> <th>UNIX V7<sup id="cite_ref-UNIX_V7_59-1" class="reference"><a href="#cite_note-UNIX_V7-59"><span class="cite-bracket">[</span>59<span class="cite-bracket">]</span></a></sup> </th> <th>UNIX 03<sup id="cite_ref-UNIX_03_58-1" class="reference"><a href="#cite_note-UNIX_03-58"><span class="cite-bracket">[</span>58<span class="cite-bracket">]</span></a></sup> </th> <th>UNIX 98<sup id="cite_ref-UNIX_98_57-1" class="reference"><a href="#cite_note-UNIX_98-57"><span class="cite-bracket">[</span>57<span class="cite-bracket">]</span></a></sup> </th> <th>UNIX 95<sup id="cite_ref-UNIX_95_56-1" class="reference"><a href="#cite_note-UNIX_95-56"><span class="cite-bracket">[</span>56<span class="cite-bracket">]</span></a></sup> </th> <th>UNIX 93<sup id="cite_ref-UNIX_93_55-1" class="reference"><a href="#cite_note-UNIX_93-55"><span class="cite-bracket">[</span>55<span class="cite-bracket">]</span></a></sup> </th></tr> <tr> <td><a href="/wiki/IBM_AIX" title="IBM AIX">AIX</a> </td> <td><a href="/wiki/IBM_Corporation" class="mw-redirect" title="IBM Corporation">IBM Corporation</a> </td> <td><a href="/wiki/Power_ISA" title="Power ISA">POWER processors</a> </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td></tr> <tr> <td><a href="/wiki/HP-UX" title="HP-UX">HP-UX</a> </td> <td><a href="/wiki/Hewlett_Packard_Enterprise" title="Hewlett Packard Enterprise">Hewlett Packard Enterprise</a> </td> <td><a href="/wiki/IA-64" title="IA-64">IA-64</a>, <a href="/wiki/PA-RISC" title="PA-RISC">PA-RISC</a> </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td></tr> <tr> <td><a href="/wiki/MacOS" title="MacOS">macOS</a> </td> <td><a href="/wiki/Apple_Inc." title="Apple Inc.">Apple</a> </td> <td><a href="/wiki/X86-64" title="X86-64">x86-64</a>, <a href="/wiki/ARM64" class="mw-redirect" title="ARM64">ARM64</a> </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td></tr> <tr> <td><a href="/wiki/SCO_OpenServer" class="mw-redirect" title="SCO OpenServer">OpenServer</a> </td> <td><a href="/wiki/Xinuos" title="Xinuos">Xinuos</a> </td> <td><a href="/wiki/IA-32" title="IA-32">IA-32</a> </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td></tr> <tr> <td><a href="/wiki/UnixWare" title="UnixWare">UnixWare</a> </td> <td><a href="/wiki/Xinuos" title="Xinuos">Xinuos</a> </td> <td><a href="/wiki/IA-32" title="IA-32">IA-32</a> </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td></tr> <tr> <td><a href="/wiki/Z/OS" title="Z/OS">z/OS</a> </td> <td><a href="/wiki/IBM_Corporation" class="mw-redirect" title="IBM Corporation">IBM Corporation</a> </td> <td><a href="/wiki/Z/Architecture" title="Z/Architecture">z/Architecture</a> </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Yes </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No </td></tr></tbody></table> <div class="mw-heading mw-heading3"><h3 id="Currently_registered_UNIX_systems">Currently registered UNIX systems</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=17" title="Edit section: Currently registered UNIX systems"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading4"><h4 id="AIX">AIX</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=18" title="Edit section: AIX"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/IBM_AIX" title="IBM AIX">AIX</a> version 7, at either 7.1 TL5 (or later) or 7.2 TL2 (or later) are registered as UNIX 03 compliant.<sup id="cite_ref-61" class="reference"><a href="#cite_note-61"><span class="cite-bracket">[</span>61<span class="cite-bracket">]</span></a></sup> AIX version 7, at 7.2 TL5 (or later) are registered as UNIX V7 compliant.<sup id="cite_ref-62" class="reference"><a href="#cite_note-62"><span class="cite-bracket">[</span>62<span class="cite-bracket">]</span></a></sup> Older versions were previously certified to the UNIX 95 and UNIX 98 marks.<sup id="cite_ref-2003-register_63-0" class="reference"><a href="#cite_note-2003-register-63"><span class="cite-bracket">[</span>63<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="HP-UX">HP-UX</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=19" title="Edit section: HP-UX"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/HP-UX" title="HP-UX">HP-UX</a> 11i V3 Release B.11.31 is registered as UNIX 03 compliant. Previous releases were registered as UNIX 95.<sup id="cite_ref-64" class="reference"><a href="#cite_note-64"><span class="cite-bracket">[</span>64<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="macOS">macOS</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=20" title="Edit section: macOS"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Apple_Inc." title="Apple Inc.">Apple</a> <a href="/wiki/MacOS" title="MacOS">macOS</a> (formerly known as Mac OS X and OS X) is registered as UNIX 03 compliant.<sup id="cite_ref-65" class="reference"><a href="#cite_note-65"><span class="cite-bracket">[</span>65<span class="cite-bracket">]</span></a></sup> The first version registered was <a href="/wiki/Mac_OS_X_Leopard" title="Mac OS X Leopard">Mac OS X 10.5 Leopard</a>, certified on October 26, 2007 (on x86 systems).<sup id="cite_ref-66" class="reference"><a href="#cite_note-66"><span class="cite-bracket">[</span>66<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-67" class="reference"><a href="#cite_note-67"><span class="cite-bracket">[</span>67<span class="cite-bracket">]</span></a></sup> All versions of <a href="/wiki/MacOS" title="MacOS">macOS</a> from Mac OS X Leopard to <a href="/wiki/MacOS_Catalina" title="MacOS Catalina">macOS 10.15 Catalina</a>, except for <a href="/wiki/Mac_OS_X_Lion" class="mw-redirect" title="Mac OS X Lion">OS X Lion</a>,<sup id="cite_ref-68" class="reference"><a href="#cite_note-68"><span class="cite-bracket">[</span>68<span class="cite-bracket">]</span></a></sup> have been registered on Intel-based systems, and all versions from <a href="/wiki/MacOS_Big_Sur" title="MacOS Big Sur">macOS 11 Big Sur</a>, the successor to macOS Catalina, up to <a href="/wiki/MacOS_Sonoma" title="MacOS Sonoma">macOS 14 Sonoma</a> have been registered on both x86-64 and ARM64 systems.<sup id="cite_ref-69" class="reference"><a href="#cite_note-69"><span class="cite-bracket">[</span>69<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Xinuos">Xinuos</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=21" title="Edit section: Xinuos"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/UnixWare" title="UnixWare">UnixWare</a> 7.1.3 and later is registered as UNIX 95 compliant. <a href="/wiki/OpenServer" title="OpenServer">OpenServer</a> 5 and 6 are registered as UNIX 93 compliant. </p> <div class="mw-heading mw-heading4"><h4 id="z/OS"><span id="z.2FOS"></span>z/OS</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=22" title="Edit section: z/OS"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>IBM <a href="/wiki/Z/OS" title="Z/OS">z/OS</a> 1.2 and higher is registered as UNIX 95 compliant. z/OS 1.9, released on September 28, 2007, and subsequent releases "better align" with UNIX 03.<sup id="cite_ref-70" class="reference"><a href="#cite_note-70"><span class="cite-bracket">[</span>70<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Previously_registered_UNIX_systems">Previously registered UNIX systems</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=23" title="Edit section: Previously registered UNIX systems"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading4"><h4 id="EulerOS">EulerOS</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=24" title="Edit section: EulerOS"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/EulerOS" title="EulerOS">EulerOS</a> 2.0 for the <a href="/wiki/X86-64" title="X86-64">x86-64</a> architecture was registered as UNIX 03 compliant.<sup id="cite_ref-71" class="reference"><a href="#cite_note-71"><span class="cite-bracket">[</span>71<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-euler-cert_72-0" class="reference"><a href="#cite_note-euler-cert-72"><span class="cite-bracket">[</span>72<span class="cite-bracket">]</span></a></sup> The UNIX 03 conformance statement shows that the standard C compiler is from the <a href="/wiki/GNU_Compiler_Collection" title="GNU Compiler Collection">GNU Compiler Collection</a> (<style data-mw-deduplicate="TemplateStyles:r886049734">.mw-parser-output .monospaced{font-family:monospace,monospace}</style><span class="monospaced">gcc</span>), and that the system is a <a href="/wiki/Linux_distribution" title="Linux distribution">Linux distribution</a> of the <a href="/wiki/Red_Hat_Enterprise_Linux" title="Red Hat Enterprise Linux">Red Hat Enterprise Linux</a> family.<sup id="cite_ref-EulerOS_conformance_commands_73-0" class="reference"><a href="#cite_note-EulerOS_conformance_commands-73"><span class="cite-bracket">[</span>73<span class="cite-bracket">]</span></a></sup> The UNIX 03 certification expired in September 2022 and has not been renewed.<sup id="cite_ref-euler-cert_72-1" class="reference"><a href="#cite_note-euler-cert-72"><span class="cite-bracket">[</span>72<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="FTX">FTX</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=25" title="Edit section: FTX"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Stratus_Technologies" title="Stratus Technologies">Stratus Technologies</a> DNCP Series servers running FTX Release 3 were registered as UNIX 93 compliant.<sup id="cite_ref-74" class="reference"><a href="#cite_note-74"><span class="cite-bracket">[</span>74<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Inspur_K-UX">Inspur K-UX</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=26" title="Edit section: Inspur K-UX"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Inspur_K-UX" title="Inspur K-UX">Inspur K-UX</a> 2.0 and 3.0 for the <a href="/wiki/X86-64" title="X86-64">x86-64</a> architecture were certified as UNIX 03 compliant.<sup id="cite_ref-75" class="reference"><a href="#cite_note-75"><span class="cite-bracket">[</span>75<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-inspur_conformance_statement_76-0" class="reference"><a href="#cite_note-inspur_conformance_statement-76"><span class="cite-bracket">[</span>76<span class="cite-bracket">]</span></a></sup> The UNIX 03 conformance statement for Inspur K-UX 2.0 and 3.0 shows that the standard C compiler is from the <a href="/wiki/GNU_Compiler_Collection" title="GNU Compiler Collection">GNU Compiler Collection</a> (<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">gcc</span>), and that the system is a <a href="/wiki/Linux_distribution" title="Linux distribution">Linux distribution</a> of the <a href="/wiki/Red_Hat" title="Red Hat">Red Hat</a> family.<sup id="cite_ref-inspur_conformance_commands_77-0" class="reference"><a href="#cite_note-inspur_conformance_commands-77"><span class="cite-bracket">[</span>77<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="IRIX">IRIX</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=27" title="Edit section: IRIX"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Silicon_Graphics" title="Silicon Graphics">SGI</a> <a href="/wiki/IRIX" title="IRIX">IRIX</a> 6.5 was registered as UNIX 95 compliant.<sup id="cite_ref-78" class="reference"><a href="#cite_note-78"><span class="cite-bracket">[</span>78<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="OS/390"><span id="OS.2F390"></span>OS/390</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=28" title="Edit section: OS/390"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>IBM <a href="/wiki/OS/390" title="OS/390">OS/390</a> was registered as UNIX 95 compliant beginning with the V2R4 release.<sup id="cite_ref-79" class="reference"><a href="#cite_note-79"><span class="cite-bracket">[</span>79<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Reliant_UNIX">Reliant UNIX</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=29" title="Edit section: Reliant UNIX"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The last <a href="/wiki/Reliant_UNIX" class="mw-redirect" title="Reliant UNIX">Reliant UNIX</a> versions were registered as UNIX 95 compliant (XPG4 hard branding). </p> <div class="mw-heading mw-heading4"><h4 id="Solaris">Solaris</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=30" title="Edit section: Solaris"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Solaris_(operating_system)" class="mw-redirect" title="Solaris (operating system)">Solaris</a> 11.4 was previously registered as UNIX v7 compliant in 2018.<sup id="cite_ref-80" class="reference"><a href="#cite_note-80"><span class="cite-bracket">[</span>80<span class="cite-bracket">]</span></a></sup> Solaris 11 and Solaris 10 were registered as UNIX 03 compliant on <a href="/wiki/32-bit" class="mw-redirect" title="32-bit">32-bit</a> and <a href="/wiki/64-bit" class="mw-redirect" title="64-bit">64-bit</a> <a href="/wiki/X86" title="X86">x86</a> (<a href="/wiki/X86-64" title="X86-64">X86-64</a>) and <a href="/wiki/SPARC" title="SPARC">SPARC</a> systems. Solaris 8 and 9 were registered as UNIX 98 compliant on <a href="/wiki/32-bit" class="mw-redirect" title="32-bit">32-bit</a> <a href="/wiki/X86" title="X86">x86</a> and <a href="/wiki/SPARC" title="SPARC">SPARC</a> systems; 64-bit x86 systems were not supported. Solaris 2.4 and 2.6, on both x86 and SPARC, were certified to the UNIX 93 and UNIX 95 marks respectively.<sup id="cite_ref-2003-register_63-1" class="reference"><a href="#cite_note-2003-register-63"><span class="cite-bracket">[</span>63<span class="cite-bracket">]</span></a></sup> </p><p>Solaris 2.5.1 was also registered as UNIX 95 compliant on the <a href="/wiki/PReP" class="mw-redirect" title="PReP">PReP</a> <a href="/wiki/PowerPC" title="PowerPC">PowerPC</a> platform in 1996, but the product was withdrawn before more than a few dozen copies had been sold.<sup id="cite_ref-81" class="reference"><a href="#cite_note-81"><span class="cite-bracket">[</span>81<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Tru64_UNIX">Tru64 UNIX</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=31" title="Edit section: Tru64 UNIX"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Tru64_UNIX" title="Tru64 UNIX">Tru64 UNIX</a> V5.1A and later were registered as UNIX 98 compliant.<sup id="cite_ref-82" class="reference"><a href="#cite_note-82"><span class="cite-bracket">[</span>82<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Other">Other</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=32" title="Edit section: Other"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Other operating systems previously registered as UNIX 95 or UNIX 93 compliant: </p> <ul><li><a href="/wiki/NCR_Corporation" class="mw-redirect" title="NCR Corporation">NCR</a> UNIX SVR4</li> <li><a href="/wiki/NEC" title="NEC">NEC</a> UX/4800</li></ul> <div class="mw-heading mw-heading3"><h3 id="Non-registered_Unix-like_systems">Non-registered Unix-like systems</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=33" title="Edit section: Non-registered Unix-like systems"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Developers and vendors of <a href="/wiki/Unix-like" title="Unix-like">Unix-like</a> operating systems such as <a href="/wiki/Linux" title="Linux">Linux</a>, <a href="/wiki/FreeBSD" title="FreeBSD">FreeBSD</a>, and <a href="/wiki/MINIX" class="mw-redirect" title="MINIX">MINIX</a> typically do not certify their distributions and do not install full POSIX utilities by default. </p><p>For Linux, <a href="/wiki/Pax_(command)" title="Pax (command)">pax</a> command is usually not installed; furthermore, pax command packages available for Linux often lack pax file format support required by POSIX.<sup id="cite_ref-83" class="reference"><a href="#cite_note-83"><span class="cite-bracket">[</span>83<span class="cite-bracket">]</span></a></sup> Sometimes, SUS compliance can be improved by installing additional packages, but very few Linux systems can be configured to be completely conformant. The <a href="/wiki/Linux_Standard_Base" title="Linux Standard Base">Linux Standard Base</a> was formed in 2001 as an attempt to standardize the internal structures of Linux-based systems for increased compatibility. It is based on the POSIX specifications, the Single UNIX Specification, and other open standards, and also extends them in several areas; but there are some conflicts between the LSB and the POSIX standards.<sup id="cite_ref-84" class="reference"><a href="#cite_note-84"><span class="cite-bracket">[</span>84<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-85" class="reference"><a href="#cite_note-85"><span class="cite-bracket">[</span>85<span class="cite-bracket">]</span></a></sup> Few <a href="/wiki/Linux_distribution" title="Linux distribution">Linux distributions</a> actually go through certification as LSB compliant.<sup id="cite_ref-86" class="reference"><a href="#cite_note-86"><span class="cite-bracket">[</span>86<span class="cite-bracket">]</span></a></sup> </p><p><a href="/wiki/Darwin_(operating_system)" title="Darwin (operating system)">Darwin</a>, the open source subset of macOS, has behavior that can be set to comply with UNIX 03.<sup id="cite_ref-87" class="reference"><a href="#cite_note-87"><span class="cite-bracket">[</span>87<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-88" class="reference"><a href="#cite_note-88"><span class="cite-bracket">[</span>88<span class="cite-bracket">]</span></a></sup> Darwin uses a 4.4BSD-derived pax command,<sup id="cite_ref-89" class="reference"><a href="#cite_note-89"><span class="cite-bracket">[</span>89<span class="cite-bracket">]</span></a></sup> which lacks multibyte support for filenames.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (November 2023)">citation needed</span></a></i>]</sup> </p><p>FreeBSD previously had a "C99 and POSIX Conformance Project" which aimed for compliance with a subset of the Single UNIX Specification, and documentation where there were differences.<sup id="cite_ref-90" class="reference"><a href="#cite_note-90"><span class="cite-bracket">[</span>90<span class="cite-bracket">]</span></a></sup> FreeBSD pax command, derived from 4.4BSD, does not fully support pax file format.<sup id="cite_ref-91" class="reference"><a href="#cite_note-91"><span class="cite-bracket">[</span>91<span class="cite-bracket">]</span></a></sup> pax and ustar in-archive format use the same with slightly different defaults (5120 block size vs 10240 block size);<sup id="cite_ref-92" class="reference"><a href="#cite_note-92"><span class="cite-bracket">[</span>92<span class="cite-bracket">]</span></a></sup> however, FreeBSD's pax lacks the extended PAX headers used for extended character set support. FreeBSD man pages sometimes indicate deviations from POSIX and thus SUS in their STANDARDS sections.<sup id="cite_ref-93" class="reference"><a href="#cite_note-93"><span class="cite-bracket">[</span>93<span class="cite-bracket">]</span></a></sup> </p><p>OpenBSD man pages sometimes indicate deviations from POSIX and thus SUS in their STANDARDS sections.<sup id="cite_ref-94" class="reference"><a href="#cite_note-94"><span class="cite-bracket">[</span>94<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-95" class="reference"><a href="#cite_note-95"><span class="cite-bracket">[</span>95<span class="cite-bracket">]</span></a></sup> </p><p>MINIX pax command does not support pax file format<sup id="cite_ref-96" class="reference"><a href="#cite_note-96"><span class="cite-bracket">[</span>96<span class="cite-bracket">]</span></a></sup> and thereby fails POSIX.1-2001. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=34" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/List_of_Unix_commands" class="mw-redirect" title="List of Unix commands">List of Unix commands</a></li> <li><a href="/wiki/Unix_wars" title="Unix wars">Unix wars</a></li> <li><a href="/wiki/Functional_specification" title="Functional specification">Functional specification</a></li> <li><a href="/wiki/Manual_page_(Unix)" class="mw-redirect" title="Manual page (Unix)">UNIX manual</a></li> <li><a href="/wiki/Open_system_(computing)" title="Open system (computing)">Open system (computing)</a></li> <li><a href="/wiki/Open_standard" title="Open standard">Open standard</a></li> <li><a href="/wiki/POSIX" title="POSIX">POSIX</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=35" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://unix.org/questions_answers.html">"Questions & Answers"</a>. <i>unix.org</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=unix.org&rft.atitle=Questions+%26+Answers&rft_id=https%3A%2F%2Funix.org%2Fquestions_answers.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.opengroup.org/membership/forums/platform/unix">"The UNIX Standard"</a>. <i><a href="/wiki/The_Open_Group" title="The Open Group">The Open Group</a></i>. August 27, 2018.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=The+Open+Group&rft.atitle=The+UNIX+Standard&rft.date=2018-08-27&rft_id=https%3A%2F%2Fwww.opengroup.org%2Fmembership%2Fforums%2Fplatform%2Funix&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://publications.opengroup.org/standards/unix/t101">"Single UNIX Specification, Version 4, 2018 Edition"</a>. <i><a href="/wiki/The_Open_Group" title="The Open Group">The Open Group</a></i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=The+Open+Group&rft.atitle=Single+UNIX+Specification%2C+Version+4%2C+2018+Edition&rft_id=https%3A%2F%2Fpublications.opengroup.org%2Fstandards%2Funix%2Ft101&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKelty" class="citation web cs1">Kelty, Christopher M. <a rel="nofollow" class="external text" href="https://kelty.org/or/papers/Kelty_WULP_Conceiving_2009.pdf">"Conceiving Open Systems"</a> <span class="cs1-format">(PDF)</span>. <i>kelty.org</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=kelty.org&rft.atitle=Conceiving+Open+Systems&rft.aulast=Kelty&rft.aufirst=Christopher+M.&rft_id=https%3A%2F%2Fkelty.org%2For%2Fpapers%2FKelty_WULP_Conceiving_2009.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://docs.oracle.com/cd/E19641-01/802-1953/802-1953.pdf"><i>Standards Conformance Guide</i></a> <span class="cs1-format">(PDF)</span>. SunSoft. November 1995.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Standards+Conformance+Guide&rft.pub=SunSoft&rft.date=1995-11&rft_id=https%3A%2F%2Fdocs.oracle.com%2Fcd%2FE19641-01%2F802-1953%2F802-1953.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=QcG4wAEACAAJ"><i>System V Interface Definition</i></a>. 1985. <a href="/wiki/ASIN_(identifier)" class="mw-redirect" title="ASIN (identifier)">ASIN</a> <a rel="nofollow" class="external text" href="https://www.amazon.com/dp/B000KF6SCE">B000KF6SCE</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=System+V+Interface+Definition&rft.date=1985&rft_id=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB000KF6SCE%23id-name%3DASIN&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DQcG4wAEACAAJ&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-raymond2003-7"><span class="mw-cite-backlink">^ <a href="#cite_ref-raymond2003_7-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-raymond2003_7-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-raymond2003_7-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFRaymond2003" class="citation book cs1"><a href="/wiki/Eric_S._Raymond" title="Eric S. Raymond">Raymond, Eric S.</a> (September 19, 2003). <a rel="nofollow" class="external text" href="http://www.catb.org/~esr/writings/taoup/html/ch17s02.html#id2994594">"Standards and the Unix Wars"</a>. <a rel="nofollow" class="external text" href="http://www.catb.org/~esr/writings/taoup/html/"><i>The Art of UNIX Programming</i></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.atitle=Standards+and+the+Unix+Wars&rft.btitle=The+Art+of+UNIX+Programming&rft.date=2003-09-19&rft.aulast=Raymond&rft.aufirst=Eric+S.&rft_id=http%3A%2F%2Fwww.catb.org%2F~esr%2Fwritings%2Ftaoup%2Fhtml%2Fch17s02.html%23id2994594&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFStevensFennerRudoff2003" class="citation book cs1"><a href="/wiki/W._Richard_Stevens" title="W. Richard Stevens">Stevens, W. Richard</a>; Fenner, Bill; Rudoff, Andrew M. (2003). <i>Unix Network Programming, Volume 1: The Sockets Networking API</i> (3rd ed.). Addison-Wesley Professional. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0131411555" title="Special:BookSources/978-0131411555"><bdi>978-0131411555</bdi></a>. <a href="/wiki/OCLC_(identifier)" class="mw-redirect" title="OCLC (identifier)">OCLC</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/oclc/53867239">53867239</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Unix+Network+Programming%2C+Volume+1%3A+The+Sockets+Networking+API&rft.edition=3rd&rft.pub=Addison-Wesley+Professional&rft.date=2003&rft_id=info%3Aoclcnum%2F53867239&rft.isbn=978-0131411555&rft.aulast=Stevens&rft.aufirst=W.+Richard&rft.au=Fenner%2C+Bill&rft.au=Rudoff%2C+Andrew+M.&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-unixorgsus-9"><span class="mw-cite-backlink">^ <a href="#cite_ref-unixorgsus_9-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-unixorgsus_9-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-unixorgsus_9-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-unixorgsus_9-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-unixorgsus_9-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-unixorgsus_9-5"><sup><i><b>f</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://unix.org/what_is_unix/single_unix_specification.html">"The Single UNIX Specification"</a>. <i>unix.org</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=unix.org&rft.atitle=The+Single+UNIX+Specification&rft_id=https%3A%2F%2Funix.org%2Fwhat_is_unix%2Fsingle_unix_specification.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-unixorghist-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-unixorghist_10-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://unix.org/what_is_unix/history_timeline.html">"The UNIX System -- History and Timeline -- UNIX History"</a>. <i>unix.org</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=unix.org&rft.atitle=The+UNIX+System+--+History+and+Timeline+--+UNIX+History&rft_id=https%3A%2F%2Funix.org%2Fwhat_is_unix%2Fhistory_timeline.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFFennessy1993" class="citation newsgroup cs1">Fennessy, Quentin (October 12, 1993). <a rel="nofollow" class="external text" href="https://groups.google.com/g/comp.std.unix/c/Jblvq9RejzI/m/ypx8LcZjBmEJ">"The name "UNIX" is now the property of X/Open"</a>. <a href="/wiki/Usenet_newsgroup" title="Usenet newsgroup">Newsgroup</a>: <a rel="nofollow" class="external text" href="news:comp.std.unix">comp.std.unix</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=The+name+%22UNIX%22+is+now+the+property+of+X%2FOpen&rft.pub=comp.std.unix&rft.date=1993-10-12&rft.aulast=Fennessy&rft.aufirst=Quentin&rft_id=https%3A%2F%2Fgroups.google.com%2Fg%2Fcomp.std.unix%2Fc%2FJblvq9RejzI%2Fm%2Fypx8LcZjBmEJ&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://unix.org/questions_answers/faq.html">"Frequently Asked Questions"</a>. <i>unix.org</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=unix.org&rft.atitle=Frequently+Asked+Questions&rft_id=https%3A%2F%2Funix.org%2Fquestions_answers%2Ffaq.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-13">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/009656599/toc.pdf"><i>X/Open CAE Specification System Interface Definitions, Issue 4, Version 2</i></a> <span class="cs1-format">(PDF)</span>. X/Open Company. 1994.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=X%2FOpen+CAE+Specification+System+Interface+Definitions%2C+Issue+4%2C+Version+2&rft.pub=X%2FOpen+Company&rft.date=1994&rft_id=https%3A%2F%2Fpubs.opengroup.org%2Fonlinepubs%2F009656599%2Ftoc.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-14">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/9695969499/toc.pdf"><i>X/Open CAE Specification System Interfaces and Headers, Issue 4, Version 2</i></a> <span class="cs1-format">(PDF)</span>. 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title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=The+Open+Group&rft.atitle=The+Open+Brand+-+The+full+register+of+certified+products&rft_id=https%3A%2F%2Fwww.opengroup.org%2Fopenbrand%2Fregister%2Findex2.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-UNIX_93-55"><span class="mw-cite-backlink">^ <a href="#cite_ref-UNIX_93_55-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-UNIX_93_55-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.opengroup.org/openbrand/register/xt.htm">"The Open Brand Register, UNIX 93"</a>. <i><a href="/wiki/The_Open_Group" title="The Open Group">The Open Group</a></i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=The+Open+Group&rft.atitle=The+Open+Brand+Register%2C+UNIX+93&rft_id=https%3A%2F%2Fwww.opengroup.org%2Fopenbrand%2Fregister%2Fxt.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-UNIX_95-56"><span class="mw-cite-backlink">^ <a href="#cite_ref-UNIX_95_56-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-UNIX_95_56-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.opengroup.org/openbrand/register/xu.htm">"The Open Brand Register, UNIX 95"</a>. <i><a href="/wiki/The_Open_Group" title="The Open Group">The Open Group</a></i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=The+Open+Group&rft.atitle=The+Open+Brand+Register%2C+UNIX+95&rft_id=https%3A%2F%2Fwww.opengroup.org%2Fopenbrand%2Fregister%2Fxu.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-UNIX_98-57"><span class="mw-cite-backlink">^ <a href="#cite_ref-UNIX_98_57-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-UNIX_98_57-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.opengroup.org/openbrand/register/xx.htm">"The Open Brand Register, UNIX 98"</a>. <i><a href="/wiki/The_Open_Group" title="The Open Group">The Open Group</a></i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=The+Open+Group&rft.atitle=The+Open+Brand+Register%2C+UNIX+98&rft_id=https%3A%2F%2Fwww.opengroup.org%2Fopenbrand%2Fregister%2Fxx.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-UNIX_03-58"><span class="mw-cite-backlink">^ <a href="#cite_ref-UNIX_03_58-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-UNIX_03_58-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.opengroup.org/openbrand/register/xy.htm">"The Open Brand Register, UNIX 03"</a>. <i><a href="/wiki/The_Open_Group" title="The Open Group">The Open Group</a></i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=The+Open+Group&rft.atitle=The+Open+Brand+Register%2C+UNIX+03&rft_id=https%3A%2F%2Fwww.opengroup.org%2Fopenbrand%2Fregister%2Fxy.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-UNIX_V7-59"><span class="mw-cite-backlink">^ <a href="#cite_ref-UNIX_V7_59-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-UNIX_V7_59-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.opengroup.org/openbrand/register/xv7.htm">"The Open Brand Register, UNIX V7"</a>. <i><a href="/wiki/The_Open_Group" title="The Open Group">The Open Group</a></i>.</cite><span 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title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=UNIX+03%2C+AIX&rft.au=The+Open+Group&rft_id=https%3A%2F%2Fwww.opengroup.org%2Fopenbrand%2Fregister%2Fbrand3637.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-62"><span class="mw-cite-backlink"><b><a href="#cite_ref-62">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFThe_Open_Group" class="citation web cs1">The Open Group. <a rel="nofollow" class="external text" href="https://www.opengroup.org/openbrand/register/brand3658.htm">"UNIX V7, AIX"</a>.</cite><span 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Retrieved <span class="nowrap">January 23,</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Open+Group&rft.atitle=The+Open+Brand+-+Register+of+Certified+Products&rft.date=2003-07-23&rft_id=http%3A%2F%2Fwww.opengroup.org%2Fopenbrand%2Fregister%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-64"><span class="mw-cite-backlink"><b><a href="#cite_ref-64">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20140727044600/http://h21007.www2.hp.com/portal/download/files/unprot/STK/HPUX_STK/impacts/i1071.html">"UNIX 2003 Standard Profile conformance"</a>. <a href="/wiki/Hewlett-Packard" title="Hewlett-Packard">Hewlett-Packard</a>. 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Retrieved <span class="nowrap">June 11,</span> 2007</span>. <q>Leopard is now an Open Brand UNIX 03 Registered Product, conforming to the SUSv3 and POSIX 1003.1 specifications for the C API, Shell Utilities, and Threads.</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Leopard+Technology+Overview&rft.atitle=Mac+OS+X+Leopard+-+Technology+-+UNIX&rft_id=https%3A%2F%2Fwww.apple.com%2Fmacosx%2Fleopard%2Ftechnology%2Funix.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-67"><span class="mw-cite-backlink"><b><a href="#cite_ref-67">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFThe_Open_Group" class="citation web cs1">The Open Group. <a rel="nofollow" class="external text" href="https://www.opengroup.org/openbrand/register/brand3555.htm">"Mac OS X Version 10.5 Leopard on Intel-based Macintosh computers certification"</a><span class="reference-accessdate">. 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The Open Group.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=pax+-+portable+archive+interchange&rft.pub=The+Open+Group&rft_id=https%3A%2F%2Fpubs.opengroup.org%2Fonlinepubs%2F9699919799%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> <li id="cite_note-93"><span class="mw-cite-backlink"><b><a href="#cite_ref-93">^</a></b></span> <span class="reference-text"><span class="plainlinksneverexpand"><code><a rel="nofollow" class="external text" href="https://www.freebsd.org/cgi/man.cgi?query=awk&sektion=1">awk(1)</a></code></span> – <a href="/wiki/FreeBSD" title="FreeBSD">FreeBSD</a> General Commands <a href="/wiki/Man_page" title="Man page">Manual</a></span> </li> <li id="cite_note-94"><span class="mw-cite-backlink"><b><a href="#cite_ref-94">^</a></b></span> <span class="reference-text"><span class="plainlinksneverexpand"><code><a rel="nofollow" class="external text" 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href="https://man.minix3.org/cgi-bin/man.cgi?query=pax&apropos=0&sektion=0&manpath=Minix+3.3.0&arch=default&format=html">"pax(1)"</a>. <i>man.minix3.org</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=man.minix3.org&rft.atitle=pax%281%29&rft_id=https%3A%2F%2Fman.minix3.org%2Fcgi-bin%2Fman.cgi%3Fquery%3Dpax%26apropos%3D0%26sektion%3D0%26manpath%3DMinix%2B3.3.0%26arch%3Ddefault%26format%3Dhtml&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Single_UNIX_Specification&action=edit&section=36" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFAndrew_Josey2020" class="citation journal cs1">Andrew Josey (June 8, 2020). <a rel="nofollow" class="external text" href="https://www.opengroup.org/austin/papers/single_unix_faq.html">"Single UNIX Specification Frequently Asked Questions"</a>. <i>opengroup.org</i>. 1.12.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=opengroup.org&rft.atitle=Single+UNIX+Specification+Frequently+Asked+Questions&rft.date=2020-06-08&rft.au=Andrew+Josey&rft_id=https%3A%2F%2Fwww.opengroup.org%2Faustin%2Fpapers%2Fsingle_unix_faq.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASingle+UNIX+Specification" class="Z3988"></span></li> <li><a rel="nofollow" class="external text" href="https://unix.org/what_is_unix/single_unix_specification.html">The Single UNIX Specification</a>, unix.org</li> <li>Single UNIX Specification, Version 1 <ul><li><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/009656599/toc.pdf">X/Open CAE Specification System Interface Definitions, Issue 4, Version 2</a>, 1994, opengroup.org</li> <li><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/9695969499/toc.pdf">X/Open CAE Specification System Interfaces and Headers, Issue 4, Version 2</a>, 1994, opengroup.org</li> <li><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/009656399/toc.pdf">X/Open CAE Specification Commands and Utilities, Issue 4, Version 2</a>, 1994, opengroup.org</li> <li><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/009656199/toc.pdf">X/Open CAE Specification Networking Services, Issue 4</a>, 1994, opengroup.org</li></ul></li> <li><a rel="nofollow" class="external text" href="https://publications.opengroup.org/c43x">Single UNIX® Specification, Version 1 Document Set (UNIX 95)</a>, opengroup.org – requires login to download</li> <li><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/7908799/index.html">The Single UNIX Specification, Version 2</a>, 1997, opengroup.org</li> <li><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/009695399/">The Open Group Base Specifications Issue 6</a>, 2004, opengroup.org</li> <li><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/9699919799.2008edition/">The Open Group Base Specifications Issue 7, 2008 edition</a>, opengroup.org</li> <li><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/9699919799.2013edition/">The Open Group Base Specifications Issue 7, 2013 edition</a>, opengroup.org</li> <li><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/9699919799.2016edition/">The Open Group Base Specifications Issue 7, 2016 edition</a>, opengroup.org</li> <li><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/9699919799.2018edition/">The Open Group Base Specifications Issue 7, 2018 edition</a>, opengroup.org</li> <li><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/9699919799/">The Open Group Base Specifications Issue 7</a>, opengroup.org – latest edition</li> <li><a rel="nofollow" class="external text" href="https://publications.opengroup.org/standards/unix/t101">Single UNIX Specification, Version 4, 2018 Edition</a>, opengroup.org</li> <li><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/009638999/toc.pdf">X/Open Curses, Issue 4, Version 2</a>, 1996, opengroup.org</li> <li><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/9699909599/toc.pdf">X/Open Curses, Issue 7</a>, 2009, opengroup.org</li> <li><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/7899949299/toc.pdf">POSIX Technical Corrigendum 1</a>, 1003.1-2001/Cor 1-2001, opengroup.org</li> <li><a rel="nofollow" class="external text" href="https://publications.opengroup.org/u130">Single UNIX Specification, Version 4 Technical Corrigendum No. 1</a>, IEEE Std 1003.1-2008/Cor 1-2013, opengroup.org</li> <li><a rel="nofollow" class="external text" href="https://publications.opengroup.org/u160">Single UNIX Specification, Version 4 Technical Corrigendum No. 2</a>, IEEE Std 1003.1-2008/Cor 2-2016, opengroup.org</li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl 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href="/wiki/JTAG" title="JTAG">1149.1</a></li> <li><a href="/wiki/PILOT" title="PILOT">1154</a></li> <li><a href="/wiki/IEEE_1164" title="IEEE 1164">1164</a></li> <li><a href="/wiki/Open_Firmware" title="Open Firmware">1275</a></li> <li><a href="/wiki/Distributed_Interactive_Simulation" title="Distributed Interactive Simulation">1278</a></li> <li><a href="/wiki/IEEE_1284" title="IEEE 1284">1284</a></li> <li><a href="/wiki/IEEE_1355" title="IEEE 1355">1355</a></li> <li><a href="/wiki/IEEE_1394" title="IEEE 1394">1394</a></li> <li><a href="/wiki/IEEE_1451" title="IEEE 1451">1451</a></li> <li><a href="/wiki/Standard_Delay_Format" title="Standard Delay Format">1497</a></li> <li><a href="/wiki/High_Level_Architecture" title="High Level Architecture">1516</a></li> <li><a href="/wiki/IEEE_1541-2002" class="mw-redirect" title="IEEE 1541-2002">1541</a></li> <li><a href="/wiki/IEEE_1547" title="IEEE 1547">1547</a></li> <li><a href="/wiki/IEEE_1584" title="IEEE 1584">1584</a></li> <li><a href="/wiki/Precision_Time_Protocol" title="Precision Time Protocol">1588</a></li> <li><a href="/wiki/Scalable_Coherent_Interface" title="Scalable Coherent Interface">1596</a></li> <li><a href="/wiki/Advanced_Library_Format" title="Advanced Library Format">1603</a></li> <li><a href="/wiki/IEEE_1613" title="IEEE 1613">1613</a></li> <li><a href="/wiki/IEEE_1619" class="mw-redirect" title="IEEE 1619">1619</a></li> <li><a href="/wiki/SystemC" title="SystemC">1666</a></li> <li><a href="/wiki/IEEE_1667" title="IEEE 1667">1667</a></li> <li><a href="/wiki/IEEE_1675-2008" title="IEEE 1675-2008">1675</a></li> <li><a href="/wiki/IP-XACT" title="IP-XACT">1685</a></li> <li><a href="/wiki/IEEE_1722" class="mw-redirect" title="IEEE 1722">1722</a></li> <li><a href="/wiki/IEEE_1733" class="mw-redirect" title="IEEE 1733">1733</a></li> <li><a href="/wiki/SystemVerilog" title="SystemVerilog">1800</a></li> <li><a href="/wiki/Unified_Power_Format" title="Unified Power Format">1801</a></li> <li><a href="/wiki/DNP3" title="DNP3">1815</a></li> <li><a href="/wiki/IEEE_1849" title="IEEE 1849">1849</a></li> <li><a href="/wiki/Property_Specification_Language" title="Property Specification Language">1850</a></li> <li><a href="/wiki/IEEE_1855" title="IEEE 1855">1855</a></li> <li><a href="/wiki/DySPAN" title="DySPAN">1900</a></li> <li><a href="/wiki/IEEE_1901" title="IEEE 1901">1901</a></li> <li><a href="/wiki/RuBee" title="RuBee">1902</a></li> <li><a href="/wiki/Service_Interoperability_in_Ethernet_Passive_Optical_Networks" title="Service Interoperability in Ethernet Passive Optical Networks">1904</a></li> <li><a href="/wiki/IEEE_1905" title="IEEE 1905">1905</a></li> <li><a href="/wiki/IEEE_2030" title="IEEE 2030">2030</a></li> <li><a href="/wiki/Micro_T-Kernel" title="Micro T-Kernel">2050</a></li> <li><a href="/wiki/ISO/IEEE_11073" title="ISO/IEEE 11073">11073</a></li> <li><a href="/wiki/ISO/IEC_12207" title="ISO/IEC 12207">12207</a></li> <li><a href="/wiki/Software_maintenance" title="Software maintenance">14764</a></li> <li><a href="/wiki/Risk_management" title="Risk management">16085</a></li> <li><a href="/wiki/Project_management" title="Project management">16326</a></li> <li><a href="/wiki/Requirements_engineering" title="Requirements engineering">29148</a></li> <li><a href="/wiki/ISO/IEC_42010" title="ISO/IEC 42010">42010</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/IEEE_802" title="IEEE 802">802 series</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/IEEE_802" title="IEEE 802">802</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/IEEE_802.2" title="IEEE 802.2">.2</a></li> <li><a href="/wiki/Token_bus_network" title="Token bus network">.4</a></li> <li><a href="/wiki/Token_Ring" title="Token Ring">.5</a></li> <li><a href="/wiki/IEEE_802.6" title="IEEE 802.6">.6</a></li> <li><a href="/wiki/IEEE_802.7" title="IEEE 802.7">.7</a></li> <li><a href="/wiki/IEEE_802.8" title="IEEE 802.8">.8</a></li> <li><a href="/wiki/IEEE_802.9" title="IEEE 802.9">.9</a></li> <li><a href="/wiki/IEEE_802.10" title="IEEE 802.10">.10</a></li> <li><a href="/wiki/100BaseVG" title="100BaseVG">.12</a></li> <li><a href="/wiki/Cable_modem#IEEE_802.14" title="Cable modem">.14</a></li> <li><a href="/wiki/IEEE_802.16" title="IEEE 802.16">.16</a> <ul><li><a href="/wiki/WiMAX" title="WiMAX">WiMAX · d · e</a></li></ul></li> <li><a href="/wiki/Resilient_Packet_Ring" title="Resilient Packet Ring">.17</a></li> <li><a href="/wiki/IEEE_802.18" title="IEEE 802.18">.18</a></li> <li><a href="/wiki/IEEE_802.20" title="IEEE 802.20">.20</a></li> <li><a href="/wiki/IEEE_802.21" title="IEEE 802.21">.21</a></li> <li><a href="/wiki/IEEE_802.22" title="IEEE 802.22">.22</a></li> <li><a href="/w/index.php?title=IEEE_802.24&action=edit&redlink=1" class="new" title="IEEE 802.24 (page does not exist)">.24</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/IEEE_802.1" title="IEEE 802.1">802.1</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/IEEE_802.1D" title="IEEE 802.1D">D</a></li> <li><a href="/wiki/IEEE_P802.1p" title="IEEE P802.1p">p</a></li> <li><a href="/wiki/IEEE_802.1Q" title="IEEE 802.1Q">Q</a></li> <li><a href="/wiki/IEEE_802.1Qav" class="mw-redirect" title="IEEE 802.1Qav">Qav</a></li> <li><a href="/wiki/Stream_Reservation_Protocol" title="Stream Reservation Protocol">Qat</a></li> <li><a href="/wiki/Provider_Backbone_Bridge_Traffic_Engineering" title="Provider Backbone Bridge Traffic Engineering">Qay</a></li> <li><a href="/wiki/Data_center_bridging#IEEE_Task_Group" title="Data center bridging">Qaz</a></li> <li><a href="/wiki/IEEE_802.1Qbb" class="mw-redirect" title="IEEE 802.1Qbb">Qbb</a></li> <li><a href="/wiki/Spanning_Tree_Protocol" title="Spanning Tree Protocol">w</a></li> <li><a href="/wiki/IEEE_802.1X" title="IEEE 802.1X">X</a></li> <li><a href="/wiki/Link_Layer_Discovery_Protocol" title="Link Layer Discovery Protocol">AB</a></li> <li><a href="/wiki/IEEE_802.1ad" title="IEEE 802.1ad">ad</a></li> <li><a href="/wiki/IEEE_802.1AE" title="IEEE 802.1AE">AE</a></li> <li><a href="/wiki/IEEE_802.1ag" title="IEEE 802.1ag">ag</a></li> <li><a href="/wiki/IEEE_802.1ah-2008" class="mw-redirect" title="IEEE 802.1ah-2008">ah</a></li> <li><a href="/wiki/Multiple_Registration_Protocol" title="Multiple Registration Protocol">ak</a></li> <li><a href="/wiki/IEEE_802.1aq" title="IEEE 802.1aq">aq</a></li> <li><a href="/wiki/IEEE_802.1AS" class="mw-redirect" title="IEEE 802.1AS">AS</a></li> <li><a href="/wiki/Link_aggregation" title="Link aggregation">AX</a> (<a href="/wiki/Link_Aggregation_Control_Protocol" class="mw-redirect" title="Link Aggregation Control Protocol">LACP</a>)</li> <li><a href="/wiki/Audio_Video_Bridging" title="Audio Video Bridging">BA</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/IEEE_802.3" title="IEEE 802.3">802.3</a> <br />(<a href="/wiki/Ethernet" title="Ethernet">Ethernet</a>)</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/10BASE5" title="10BASE5">-1983</a></li> <li><a href="/wiki/802.3a" class="mw-redirect" title="802.3a">a</a></li> <li><a href="/wiki/802.3b" class="mw-redirect" title="802.3b">b</a></li> <li><a href="/wiki/802.3d" class="mw-redirect" title="802.3d">d</a></li> <li><a href="/wiki/802.3e" class="mw-redirect" title="802.3e">e</a></li> <li><a href="/wiki/802.3i" class="mw-redirect" title="802.3i">i</a></li> <li><a href="/wiki/802.3j" class="mw-redirect" title="802.3j">j</a></li> <li><a href="/wiki/802.3u" class="mw-redirect" title="802.3u">u</a></li> <li><a href="/wiki/IEEE_802.3x" class="mw-redirect" title="IEEE 802.3x">x</a></li> <li><a href="/wiki/802.3y" class="mw-redirect" title="802.3y">y</a></li> <li><a href="/wiki/802.3z" class="mw-redirect" title="802.3z">z</a></li> <li><a href="/wiki/802.3ab" class="mw-redirect" title="802.3ab">ab</a></li> <li><a href="/wiki/802.3ac" class="mw-redirect" title="802.3ac">ac</a></li> <li><a href="/wiki/802.3ad" class="mw-redirect" title="802.3ad">ad</a></li> <li><a href="/wiki/802.3ae" class="mw-redirect" title="802.3ae">ae</a></li> <li><b><a href="/wiki/802.3af" class="mw-redirect" title="802.3af">af</a></b></li> <li><a href="/wiki/802.3ah" class="mw-redirect" title="802.3ah">ah</a></li> <li><a href="/wiki/802.3ak" class="mw-redirect" title="802.3ak">ak</a></li> <li><a href="/wiki/802.3an" class="mw-redirect" title="802.3an">an</a></li> <li><a href="/wiki/802.3aq" class="mw-redirect" title="802.3aq">aq</a></li> <li><b><a href="/wiki/802.3at" class="mw-redirect" title="802.3at">at</a></b></li> <li><a href="/wiki/802.3au" class="mw-redirect" title="802.3au">au</a></li> <li><a href="/wiki/802.3av" class="mw-redirect" title="802.3av">av</a></li> <li><a href="/wiki/802.3az" class="mw-redirect" title="802.3az">az</a></li> <li><a href="/wiki/802.3ba" class="mw-redirect" title="802.3ba">ba</a></li> <li><b><a href="/wiki/802.3bt" class="mw-redirect" title="802.3bt">bt</a></b></li> <li><a href="/wiki/802.3bu" class="mw-redirect" title="802.3bu">bu</a></li> <li><a href="/wiki/802.3by" class="mw-redirect" title="802.3by">by</a></li> <li><a href="/wiki/802.3bz" class="mw-redirect" title="802.3bz">bz</a></li> <li><a href="/w/index.php?title=802.3ca&action=edit&redlink=1" class="new" title="802.3ca (page does not exist)">ca</a></li> <li><a href="/w/index.php?title=802.3cb&action=edit&redlink=1" class="new" title="802.3cb (page does not exist)">cb</a></li> <li><a href="/w/index.php?title=802.3cc&action=edit&redlink=1" class="new" title="802.3cc (page does not exist)">cc</a></li> <li><a href="/w/index.php?title=802.3cd&action=edit&redlink=1" class="new" title="802.3cd (page does not exist)">cd</a></li> <li><a href="/w/index.php?title=802.3ce&action=edit&redlink=1" class="new" title="802.3ce (page does not exist)">ce</a></li> <li><a href="/wiki/802.3cg" class="mw-redirect" title="802.3cg">cg</a></li> <li><a href="/wiki/802.3ch" class="mw-redirect" title="802.3ch">ch</a></li> <li><a href="/w/index.php?title=802.3ck&action=edit&redlink=1" class="new" title="802.3ck (page does not exist)">ck</a></li> <li><a href="/w/index.php?title=802.3cm&action=edit&redlink=1" class="new" title="802.3cm (page does not exist)">cm</a></li> <li><a href="/w/index.php?title=802.3cn&action=edit&redlink=1" class="new" title="802.3cn (page does not exist)">cn</a></li> <li><a href="/w/index.php?title=802.3cp&action=edit&redlink=1" class="new" title="802.3cp (page does not exist)">cp</a></li> <li><a href="/wiki/802.3cq" class="mw-redirect" title="802.3cq">cq</a></li> <li><a href="/w/index.php?title=802.3cr&action=edit&redlink=1" class="new" title="802.3cr (page does not exist)">cr</a></li> <li><a href="/w/index.php?title=802.3cs&action=edit&redlink=1" class="new" title="802.3cs (page does not exist)">cs</a></li> <li><a href="/w/index.php?title=802.3ct&action=edit&redlink=1" class="new" title="802.3ct (page does not exist)">ct</a></li> <li><a href="/w/index.php?title=802.3cu&action=edit&redlink=1" class="new" title="802.3cu (page does not exist)">cu</a></li> <li><a href="/wiki/802.3cv" class="mw-redirect" title="802.3cv">cv</a></li> <li><a href="/w/index.php?title=802.3cw&action=edit&redlink=1" class="new" title="802.3cw (page does not exist)">cw</a></li> <li><a href="/w/index.php?title=802.3cx&action=edit&redlink=1" class="new" title="802.3cx (page does not exist)">cx</a></li> <li><a href="/w/index.php?title=802.3cy&action=edit&redlink=1" class="new" title="802.3cy (page does not exist)">cy</a></li> <li><a href="/w/index.php?title=802.3cz&action=edit&redlink=1" class="new" title="802.3cz (page does not exist)">cz</a></li> <li><a href="/w/index.php?title=802.3da&action=edit&redlink=1" class="new" title="802.3da (page does not exist)">da</a></li> <li><a href="/w/index.php?title=802.3db&action=edit&redlink=1" class="new" title="802.3db (page does not exist)">db</a></li> <li><a href="/wiki/802.3dd" class="mw-redirect" title="802.3dd">dd</a></li> <li><a href="/w/index.php?title=802.3de&action=edit&redlink=1" class="new" title="802.3de (page does not exist)">de</a></li> <li><a href="/w/index.php?title=802.3df&action=edit&redlink=1" class="new" title="802.3df (page does not exist)">df</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/IEEE_802.11" title="IEEE 802.11">802.11</a> <br />(<a href="/wiki/Wi-Fi" title="Wi-Fi">Wi-Fi</a>)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/IEEE_802.11-1997" class="mw-redirect" title="IEEE 802.11-1997">-1997</a></li> <li><a href="/wiki/IEEE_802.11_(legacy_mode)" title="IEEE 802.11 (legacy mode)">legacy mode</a></li> <li><a href="/wiki/IEEE_802.11a-1999" title="IEEE 802.11a-1999">a</a></li> <li><a href="/wiki/IEEE_802.11b-1999" title="IEEE 802.11b-1999">b</a></li> <li><a href="/wiki/IEEE_802.11c" title="IEEE 802.11c">c</a></li> <li><a href="/wiki/IEEE_802.11d-2001" title="IEEE 802.11d-2001">d</a></li> <li><a href="/wiki/IEEE_802.11e-2005" title="IEEE 802.11e-2005">e</a></li> <li><a href="/wiki/Inter-Access_Point_Protocol" title="Inter-Access Point Protocol">f</a></li> <li><a href="/wiki/IEEE_802.11g-2003" title="IEEE 802.11g-2003">g</a></li> <li><a href="/wiki/IEEE_802.11h-2003" title="IEEE 802.11h-2003">h</a></li> <li><a href="/wiki/IEEE_802.11i-2004" title="IEEE 802.11i-2004">i</a></li> <li><a href="/wiki/IEEE_802.11j-2004" title="IEEE 802.11j-2004">j</a></li> <li><a href="/wiki/IEEE_802.11k-2008" title="IEEE 802.11k-2008">k</a></li> <li><b><a href="/wiki/IEEE_802.11n-2009" title="IEEE 802.11n-2009">n</a></b> (<a href="/wiki/Wi-Fi_4" class="mw-redirect" title="Wi-Fi 4">Wi-Fi 4</a>)</li> <li><a href="/wiki/IEEE_802.11p" title="IEEE 802.11p">p</a></li> <li><a href="/wiki/IEEE_802.11r-2008" title="IEEE 802.11r-2008">r</a></li> <li><a href="/wiki/IEEE_802.11s" title="IEEE 802.11s">s</a></li> <li><a href="/wiki/IEEE_802.11u" title="IEEE 802.11u">u</a></li> <li><a href="/wiki/IEEE_802.11v" class="mw-redirect" title="IEEE 802.11v">v</a></li> <li><a href="/wiki/IEEE_802.11w-2009" title="IEEE 802.11w-2009">w</a></li> <li><a href="/wiki/IEEE_802.11y-2008" title="IEEE 802.11y-2008">y</a></li> <li><a href="/wiki/IEEE_802.11z" class="mw-redirect" title="IEEE 802.11z">z</a></li> <li>aa</li> <li><b><a href="/wiki/IEEE_802.11ac" class="mw-redirect" title="IEEE 802.11ac">ac</a></b> (<a href="/wiki/Wi-Fi_5" class="mw-redirect" title="Wi-Fi 5">Wi-Fi 5</a>)</li> <li><a href="/wiki/IEEE_802.11ad" title="IEEE 802.11ad">ad</a> (<a href="/wiki/WiGig" title="WiGig">WiGig</a>)</li> <li>ae</li> <li><a href="/wiki/IEEE_802.11af" title="IEEE 802.11af">af</a></li> <li><a href="/wiki/IEEE_802.11ah" title="IEEE 802.11ah">ah</a></li> <li><a href="/wiki/IEEE_802.11ai" title="IEEE 802.11ai">ai</a></li> <li><a href="/wiki/IEEE_802.11aj" class="mw-redirect" title="IEEE 802.11aj">aj</a></li> <li>ak</li> <li>aq</li> <li><b><a href="/wiki/IEEE_802.11ax" class="mw-redirect" title="IEEE 802.11ax">ax</a></b> (<a href="/wiki/Wi-Fi_6" title="Wi-Fi 6">Wi-Fi 6</a>)</li> <li><a href="/wiki/IEEE_802.11ay" title="IEEE 802.11ay">ay</a></li> <li>az</li> <li>ba</li> <li><a href="/wiki/IEEE_802.11bb" title="IEEE 802.11bb">bb</a></li> <li>bc</li> <li>bd</li> <li><b><a href="/wiki/IEEE_802.11be" class="mw-redirect" title="IEEE 802.11be">be</a></b> (<a href="/wiki/Wi-Fi_7" title="Wi-Fi 7">Wi-Fi 7</a>)</li> <li>bf</li> <li>bh</li> <li>bi</li> <li>bk</li> <li><b><a href="/wiki/IEEE_802.11bn" title="IEEE 802.11bn">bn</a></b> (<a href="/w/index.php?title=Wi-Fi_8&action=edit&redlink=1" class="new" title="Wi-Fi 8 (page does not exist)">Wi-Fi 8</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/IEEE_802.15" title="IEEE 802.15">802.15</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/IEEE_802.15.1" class="mw-redirect" title="IEEE 802.15.1">.1</a> (<a href="/wiki/Bluetooth" title="Bluetooth">Bluetooth</a>)</li> <li><a href="/wiki/IEEE_802.15.2" class="mw-redirect" title="IEEE 802.15.2">.2</a></li> <li><a href="/wiki/IEEE_802.15.3" class="mw-redirect" title="IEEE 802.15.3">.3</a></li> <li><a href="/wiki/IEEE_802.15.4" title="IEEE 802.15.4">.4</a> (<a href="/wiki/Zigbee" title="Zigbee">Zigbee</a>)</li> <li><a href="/wiki/IEEE_802.15.4a" title="IEEE 802.15.4a">.4a</a></li> <li><a href="/w/index.php?title=IEEE_802.15.4b&action=edit&redlink=1" class="new" title="IEEE 802.15.4b (page does not exist)">.4b</a></li> <li><a href="/w/index.php?title=IEEE_802.15.4c&action=edit&redlink=1" class="new" title="IEEE 802.15.4c (page does not exist)">.4c</a></li> <li><a href="/w/index.php?title=IEEE_802.15.4d&action=edit&redlink=1" class="new" title="IEEE 802.15.4d (page does not exist)">.4d</a></li> <li><a href="/w/index.php?title=IEEE_802.15.4e&action=edit&redlink=1" class="new" title="IEEE 802.15.4e (page does not exist)">.4e</a></li> <li><a href="/w/index.php?title=IEEE_802.15.4f&action=edit&redlink=1" class="new" title="IEEE 802.15.4f (page does not exist)">.4f</a></li> <li><a href="/w/index.php?title=IEEE_802.15.4g&action=edit&redlink=1" class="new" title="IEEE 802.15.4g (page does not exist)">.4g</a></li> <li><a href="/w/index.php?title=IEEE_802.15.4z&action=edit&redlink=1" class="new" title="IEEE 802.15.4z (page does not exist)">.4z</a></li> <li><a href="/wiki/IEEE_802.15.5" class="mw-redirect" title="IEEE 802.15.5">.5</a></li> <li><a href="/wiki/IEEE_802.15.6" title="IEEE 802.15.6">.6</a></li> <li><a href="/wiki/IEEE_802.15.7" class="mw-redirect" title="IEEE 802.15.7">.7</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Proposed</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/IEEE_P1363" title="IEEE P1363">P1363</a></li> <li><a href="/wiki/IEEE_P1619" title="IEEE P1619">P1619</a></li> <li><a href="/wiki/Rosetta-lang" title="Rosetta-lang">P1699</a></li> <li><a href="/wiki/Universal_Power_Adapter_for_Mobile_Devices" title="Universal Power Adapter for Mobile Devices">P1823</a></li> <li><a href="/wiki/IEEE_P1906.1" title="IEEE P1906.1">P1906.1</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Superseded</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/IEEE_754-1985" title="IEEE 754-1985">754-1985</a></li> <li><a href="/wiki/Software_requirements_specification" title="Software requirements specification">830</a></li> <li><a href="/wiki/IEEE_1219" class="mw-redirect" title="IEEE 1219">1219</a></li> <li><a href="/wiki/Software_requirements_specification" title="Software requirements specification">1233</a></li> <li><a href="/wiki/Concept_of_operations" title="Concept of operations">1362</a></li> <li><a href="/wiki/Verilog" title="Verilog">1364</a></li> <li><a href="/wiki/IEEE_1471" title="IEEE 1471">1471</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" 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