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.infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox vevent"><caption class="infobox-title summary">VAXELN</caption><tbody><tr><td colspan="2" class="infobox-image"><span typeof="mw:File"><a href="/wiki/File:DEC-VAXELN.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/9d/DEC-VAXELN.png/250px-DEC-VAXELN.png" decoding="async" width="250" height="54" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/9d/DEC-VAXELN.png/375px-DEC-VAXELN.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/9d/DEC-VAXELN.png/500px-DEC-VAXELN.png 2x" data-file-width="898" data-file-height="194" /></a></span></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programmer" title="Programmer">Developer</a></th><td class="infobox-data"><a href="/wiki/Digital_Equipment_Corporation" title="Digital Equipment Corporation">Digital Equipment Corporation</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programming_language" title="Programming language">Written in</a></th><td class="infobox-data"><a href="/wiki/Pascal_(programming_language)" title="Pascal (programming language)">Pascal</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Working state</th><td class="infobox-data">Discontinued</td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Source model</th><td class="infobox-data"><a href="/wiki/Closed_source" class="mw-redirect" title="Closed source">Closed source</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Initial release</th><td class="infobox-data">1982<span class="noprint">; 42 years ago</span><span style="display:none"> (<span class="bday dtstart published updated">1982</span>)</span><sup id="cite_ref-vaxeln-history_1-0" class="reference"><a href="#cite_note-vaxeln-history-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_release_life_cycle" title="Software release life cycle">Final release</a></th><td class="infobox-data">4.6 / May 1996<span class="noprint">; 28 years ago</span><span style="display:none"> (<span class="bday dtstart published updated">1996-05</span>)</span><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></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Marketing target</th><td class="infobox-data"><a href="/wiki/Embedded_system" title="Embedded system">Embedded systems</a>, <a href="/wiki/Real-time_computing" title="Real-time computing">real-time systems</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Natural_language" title="Natural language">Available in</a></th><td class="infobox-data"><a href="/wiki/English_language" title="English language">English</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Platforms</th><td class="infobox-data"><a href="/wiki/VAX" title="VAX">VAX</a> family</td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Kernel_(operating_system)" title="Kernel (operating system)">Kernel</a> type</th><td class="infobox-data"><a href="/wiki/Monolithic_kernel" title="Monolithic kernel">Monolithic</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/User_interface" title="User interface">Default<br />user interface</a></th><td class="infobox-data"><a href="/wiki/Command-line_interface" title="Command-line interface">Command-line interface</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_license" title="Software license">License</a></th><td class="infobox-data"><a href="/wiki/Proprietary_software" title="Proprietary software">Proprietary</a></td></tr></tbody></table> <p><b>VAXELN</b> (typically pronounced "VAX-elan")<sup id="cite_ref-cutler-interview_3-0" class="reference"><a href="#cite_note-cutler-interview-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-vaxeln-overview_4-0" class="reference"><a href="#cite_note-vaxeln-overview-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> is a discontinued <a href="/wiki/Real-time_operating_system" title="Real-time operating system">real-time operating system</a> for the <a href="/wiki/VAX" title="VAX">VAX</a> family of <a href="/wiki/Computer" title="Computer">computers</a> produced by the <a href="/wiki/Digital_Equipment_Corporation" title="Digital Equipment Corporation">Digital Equipment Corporation</a> (DEC) of <a href="/wiki/Maynard,_Massachusetts" title="Maynard, Massachusetts">Maynard</a>, <a href="/wiki/Massachusetts" title="Massachusetts">Massachusetts</a>.<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>As with <a href="/wiki/RSX-11" title="RSX-11">RSX-11</a> and <a href="/wiki/OpenVMS" title="OpenVMS">VMS</a>, <a href="/wiki/Dave_Cutler" title="Dave Cutler">Dave Cutler</a> was the principal force behind the development of this operating system.<sup id="cite_ref-cutler-interview_3-1" class="reference"><a href="#cite_note-cutler-interview-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Cutler's team developed the product after moving to the <a href="/wiki/Seattle" title="Seattle">Seattle</a>, <a href="/wiki/Washington_(state)" title="Washington (state)">Washington</a> area to form the DECwest Engineering Group; DEC's first engineering group outside <a href="/wiki/New_England" title="New England">New England</a>. Initial target platforms for VAXELN were the <i><a href="/wiki/Backplane" title="Backplane">backplane</a> interconnect</i> computers such as the <a href="/wiki/DEC_V-11" title="DEC V-11">V-11 family</a>. When VAXELN was well under way, Cutler spearheaded the next project, the <a href="/wiki/MicroVAX#MicroVAX_I" title="MicroVAX">MicroVAX I</a>, the first VAX <a href="/wiki/Microcomputer" title="Microcomputer">microcomputer</a>. Although it was a low-volume product compared with the New England-developed <a href="/wiki/MicroVAX#MicroVAX_II" title="MicroVAX">MicroVAX II</a>, the MicroVAX I demonstrated the set of architectural decisions needed to support a single-board implementation of the VAX computer family, and it also provided a platform for <a href="/wiki/Embedded_system" title="Embedded system">embedded system</a> applications written for VAXELN. </p><p>The VAXELN team made the decision, for the first release, to use the <a href="/wiki/Programming_language" title="Programming language">programming language</a> <a href="/wiki/Pascal_(programming_language)" title="Pascal (programming language)">Pascal</a> as its <a href="/wiki/System_programming_language" title="System programming language">system programming language</a>. The development team built the first product in approximately 18 months. Other languages, including <a href="/wiki/C_(programming_language)" title="C (programming language)">C</a>, <a href="/wiki/Ada_(programming_language)" title="Ada (programming language)">Ada</a>, and <a href="/wiki/Fortran" title="Fortran">Fortran</a> were supported in later releases of the system as optional extras. A <a href="/wiki/Relational_database" title="Relational database">relational database</a>, named <a href="/wiki/Oracle_Rdb#Rdb_on_other_platforms" title="Oracle Rdb">VAX Rdb/ELN</a> was another optional component of the system.<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> Later versions of VAXELN supported an <a href="/wiki/X11" class="mw-redirect" title="X11">X11</a> server named <i>EWS</i> (VAXELN Window Server).<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> VAXELN with EWS was used as the operating system for the <a href="/wiki/VT1000#VT1300" title="VT1000">VT1300</a> <a href="/wiki/X_terminal" title="X terminal">X terminal</a>,<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> and was sometimes used to convert old <a href="/wiki/VAXstation" title="VAXstation">VAXstation</a> hardware into X terminals.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> Beginning with version 4.3, VAXELN gained support for <a href="/wiki/TCP/IP" class="mw-redirect" title="TCP/IP">TCP/IP</a> networking and a subset of <a href="/wiki/POSIX" title="POSIX">POSIX</a> APIs.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p><p>VAXELN allowed the creation of a self-contained embedded system application that would run on VAX (and later MicroVAX) hardware with no other operating system present. The system was debuted in Las Vegas in the early 1980s, with a variety of amusing <a href="/wiki/Application_software" title="Application software">application software</a> written by the development team, ranging from a system that composed and played minuets to a robotic system that played and solved the <a href="/wiki/Tower_of_Hanoi" title="Tower of Hanoi">Tower of Hanoi</a> puzzle.<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> </p><p>VAXELN was not ported to the <a href="/wiki/DEC_Alpha" title="DEC Alpha">DEC Alpha</a> architecture, and instead was replaced with a Digital-supported port of <a href="/wiki/VxWorks" title="VxWorks">VxWorks</a> to Alpha, and a VAXELN application programming interface (<a href="/wiki/API" title="API">API</a>) compatibility layer for that platform.<sup id="cite_ref-vaxeln-history_1-1" class="reference"><a href="#cite_note-vaxeln-history-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><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> In 1999, SMART Modular Technologies acquired <a href="/wiki/Compaq" title="Compaq">Compaq</a>'s (formerly Digital's) embedded systems division, which included VAXELN.<sup id="cite_ref-vaxeln-history_1-2" class="reference"><a href="#cite_note-vaxeln-history-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><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> </p> <div class="mw-heading mw-heading2"><h2 id="Origin_of_name">Origin of name</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=VAXELN&action=edit&section=1" title="Edit section: Origin of name"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The system was originally supposed to be named <i>Executive for Local Area Network</i> (ELAN), but DEC discovered at the last minute that the word <i>Elan</i> was <a href="/wiki/Trademark" title="Trademark">trademarked</a> in a European country where DEC wished to conduct business.<sup id="cite_ref-vaxeln-overview_4-1" class="reference"><a href="#cite_note-vaxeln-overview-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> The company holding the trademark was the <a href="/wiki/Slovenia" title="Slovenia">Slovenian</a> sports equipment manufacturer <a href="/wiki/Elan_(company)" title="Elan (company)">Elan</a>. To avoid litigation, DEC quickly renamed it to VAXELN by dropping the A, much to the disgruntlement of the developers. Some documentation and marketing material had already been printed referring to the product as ELAN, and samples of these posters were prized for many years by members of the original team. </p> <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=VAXELN&action=edit&section=2" 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-vaxeln-history-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-vaxeln-history_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-vaxeln-history_1-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-vaxeln-history_1-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><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><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://rbnsn.com/pipermail/info-vax_rbnsn.com/2015-January/072784.html">"[Info-vax] History of VMS and related operating systems"</a>. 2015-01-31<span class="reference-accessdate">. Retrieved <span class="nowrap">2021-01-15</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=%5BInfo-vax%5D+History+of+VMS+and+related+operating+systems&rft.date=2015-01-31&rft_id=http%3A%2F%2Frbnsn.com%2Fpipermail%2Finfo-vax_rbnsn.com%2F2015-January%2F072784.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVAXELN" 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="http://h30266.www3.hpe.com/MasterIndex/spd/spd_00fe9638.txt">"VAXELN Toolkit, Version 4.6"</a>. Digital. May 1996<span class="reference-accessdate">. Retrieved <span class="nowrap">2021-01-15</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=VAXELN+Toolkit%2C+Version+4.6&rft.pub=Digital&rft.date=1996-05&rft_id=http%3A%2F%2Fh30266.www3.hpe.com%2FMasterIndex%2Fspd%2Fspd_00fe9638.txt&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVAXELN" class="Z3988"></span></span> </li> <li id="cite_note-cutler-interview-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-cutler-interview_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-cutler-interview_3-1"><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 id="CITEREFCutler2016" class="citation interview cs1"><a href="/wiki/Dave_Cutler" title="Dave Cutler">Cutler, Dave</a> (2016-02-25). <a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=29RkHH-psrY">"Dave Cutler Oral History"</a>. <i>youtube.com</i> (Interview). Interviewed by Grant Saviers. Computer History Museum<span class="reference-accessdate">. Retrieved <span class="nowrap">2021-02-26</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=youtube.com&rft.atitle=Dave+Cutler+Oral+History&rft.date=2016-02-25&rft.aulast=Cutler&rft.aufirst=Dave&rft_id=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3D29RkHH-psrY&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVAXELN" class="Z3988"></span></span> </li> <li id="cite_note-vaxeln-overview-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-vaxeln-overview_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-vaxeln-overview_4-1"><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.youtube.com/watch?v=-UT2b2rVhwU">"VAXELN : an overview to digital's realtime software, part 1"</a>. Digital. 1988-08-02<span class="reference-accessdate">. Retrieved <span class="nowrap">2021-11-02</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=VAXELN+%3A+an+overview+to+digital%27s+realtime+software%2C+part+1&rft.pub=Digital&rft.date=1988-08-02&rft_id=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3D-UT2b2rVhwU&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVAXELN" 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 id="CITEREFMyles_F._Connors_Jr.1985" class="citation web cs1">Myles F. Connors Jr. (1985-05-30). <a rel="nofollow" class="external text" href="http://bitsavers.org/pdf/dec/vax/vaxeln/2.0/VAXELN_2.0_Annoucement_May85.pdf">"Announcing VAXELN 2.0"</a> <span class="cs1-format">(PDF)</span>. Digital<span class="reference-accessdate">. Retrieved <span class="nowrap">2021-11-02</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Announcing+VAXELN+2.0&rft.pub=Digital&rft.date=1985-05-30&rft.au=Myles+F.+Connors+Jr.&rft_id=http%3A%2F%2Fbitsavers.org%2Fpdf%2Fdec%2Fvax%2Fvaxeln%2F2.0%2FVAXELN_2.0_Annoucement_May85.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVAXELN" 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 web cs1"><a rel="nofollow" class="external text" href="http://bitsavers.trailing-edge.com/pdf/dec/vax/vaxeln/2.0/VAXELN_2.2_Brochure_1986.pdf">"VAXELN 2.2 Brochure"</a> <span class="cs1-format">(PDF)</span>. <i>bitsavers.trailing-edge.com</i>. 1986<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-11-12</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=bitsavers.trailing-edge.com&rft.atitle=VAXELN+2.2+Brochure&rft.date=1986&rft_id=http%3A%2F%2Fbitsavers.trailing-edge.com%2Fpdf%2Fdec%2Fvax%2Fvaxeln%2F2.0%2FVAXELN_2.2_Brochure_1986.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVAXELN" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</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.digiater.nl/openvms/freeware/v50/ews/ews_v12_user_manual.ps">"VAXELN Window Server User's Guide"</a>. Digital. October 1991<span class="reference-accessdate">. Retrieved <span class="nowrap">2021-11-01</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=VAXELN+Window+Server+User%27s+Guide&rft.pub=Digital&rft.date=1991-10&rft_id=https%3A%2F%2Fwww.digiater.nl%2Fopenvms%2Ffreeware%2Fv50%2Fews%2Fews_v12_user_manual.ps&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVAXELN" 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 class="citation web cs1"><a rel="nofollow" class="external text" href="http://vtda.org/docs/computing/DEC/Terminals/EC-F0964_VT1300TerminalBrochure_1990.pdf">"VT1300 Terminal"</a> <span class="cs1-format">(PDF)</span>. Digital. 1990<span class="reference-accessdate">. Retrieved <span class="nowrap">2021-11-01</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=VT1300+Terminal&rft.pub=Digital&rft.date=1990&rft_id=http%3A%2F%2Fvtda.org%2Fdocs%2Fcomputing%2FDEC%2FTerminals%2FEC-F0964_VT1300TerminalBrochure_1990.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVAXELN" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFGus_Altobello1991" class="citation newsgroup cs1">Gus Altobello (1991-02-19). <a rel="nofollow" class="external text" href="https://eisner.decus.org/anon/htnotes/note?f1=WORKSTATIONS&f2=131.4">"What to do with VS2000's"</a>. <a href="/wiki/Usenet_newsgroup" title="Usenet newsgroup">Newsgroup</a>: <a rel="nofollow" class="external text" href="news:eisner.decus.org">eisner.decus.org</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2021-11-01</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=What+to+do+with+VS2000%27s&rft.pub=eisner.decus.org&rft.date=1991-02-19&rft.au=Gus+Altobello&rft_id=https%3A%2F%2Feisner.decus.org%2Fanon%2Fhtnotes%2Fnote%3Ff1%3DWORKSTATIONS%26f2%3D131.4&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVAXELN" class="Z3988"></span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJim_Duffy1991" class="citation news cs1">Jim Duffy (1991-12-23). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=0xEEAAAAMBAJ">"DEC adds TCP/IP, POSIX support to real-time wares"</a>. <i><a href="/wiki/Network_World" class="mw-redirect" title="Network World">Network World</a></i>. p. 11<span class="reference-accessdate">. Retrieved <span class="nowrap">2021-12-08</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Network+World&rft.atitle=DEC+adds+TCP%2FIP%2C+POSIX+support+to+real-time+wares&rft.pages=11&rft.date=1991-12-23&rft.au=Jim+Duffy&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3D0xEEAAAAMBAJ&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVAXELN" 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="CITEREFTom_Diaz2015" class="citation newsgroup cs1">Tom Diaz (2015-01-31). <a rel="nofollow" class="external text" href="https://comp.os.vms.narkive.com/QHrhOa7v/history-of-vms-and-related-operating-systems#post44">"History of VMS and related operating systems"</a>. <a href="/wiki/Usenet_newsgroup" title="Usenet newsgroup">Newsgroup</a>: <a rel="nofollow" class="external text" href="news:comp.os.vms">comp.os.vms</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2021-11-02</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=History+of+VMS+and+related+operating+systems&rft.pub=comp.os.vms&rft.date=2015-01-31&rft.au=Tom+Diaz&rft_id=https%3A%2F%2Fcomp.os.vms.narkive.com%2FQHrhOa7v%2Fhistory-of-vms-and-related-operating-systems%23post44&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVAXELN" 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="http://h30266.www3.hpe.com/masterindex/spd/spd_0054a268.txt">"VxWorks Realtime Tools for Alpha, Version 3.2"</a>. Digital. July 1995<span class="reference-accessdate">. Retrieved <span class="nowrap">2021-01-17</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=VxWorks+Realtime+Tools+for+Alpha%2C+Version+3.2&rft.pub=Digital&rft.date=1995-07&rft_id=http%3A%2F%2Fh30266.www3.hpe.com%2Fmasterindex%2Fspd%2Fspd_0054a268.txt&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVAXELN" 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 web cs1"><a rel="nofollow" class="external text" href="http://media.corporate-ir.net/media_files/irol/11/111995/pdf/081899.pdf">"SMART Modular Technologies, Inc. to Acquire Compaq's Embedded Computer Product Line"</a> <span class="cs1-format">(PDF)</span>. SMART Modular Technologies. 1999-08-19<span class="reference-accessdate">. Retrieved <span class="nowrap">2021-01-17</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=SMART+Modular+Technologies%2C+Inc.+to+Acquire+Compaq%27s+Embedded+Computer+Product+Line&rft.pub=SMART+Modular+Technologies&rft.date=1999-08-19&rft_id=http%3A%2F%2Fmedia.corporate-ir.net%2Fmedia_files%2Firol%2F11%2F111995%2Fpdf%2F081899.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVAXELN" 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=VAXELN&action=edit&section=3" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://odl.sysworks.biz/disk$vaxdocdec953/decw$book/d33vaa48.decw$book">Introduction to VAXELN</a></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 ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · ";font-weight:bold}.mw-parser-output .hlist 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li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Digital_Equipment_Corporation" title="Template:Digital Equipment Corporation"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Digital_Equipment_Corporation" title="Template talk:Digital Equipment Corporation"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Digital_Equipment_Corporation" title="Special:EditPage/Template:Digital Equipment Corporation"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Digital_Equipment_Corporation" style="font-size:114%;margin:0 4em"><a href="/wiki/Digital_Equipment_Corporation" title="Digital Equipment Corporation">Digital Equipment Corporation</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Key people</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/Ken_Olsen" title="Ken Olsen">Ken Olsen</a> (founder and CEO, 1957–1992)</li> <li><a href="/wiki/Harlan_Anderson" title="Harlan Anderson">Harlan Anderson</a> (co-founder)</li> <li><a href="/wiki/Gordon_Bell" title="Gordon Bell">Gordon Bell</a> (VP of engineering)</li> <li><a href="/wiki/Robert_Palmer_(computer_businessman)" title="Robert Palmer (computer businessman)">Robert Palmer</a> (CEO, 1992–1998)</li></ul> </div></td><td class="noviewer navbox-image" rowspan="9" style="width:1px;padding:0 0 0 2px"><div><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Digital_Equipment_Corporation_1993_logo.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/90/Digital_Equipment_Corporation_1993_logo.svg/110px-Digital_Equipment_Corporation_1993_logo.svg.png" decoding="async" width="110" height="33" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/90/Digital_Equipment_Corporation_1993_logo.svg/165px-Digital_Equipment_Corporation_1993_logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/90/Digital_Equipment_Corporation_1993_logo.svg/220px-Digital_Equipment_Corporation_1993_logo.svg.png 2x" data-file-width="3124" data-file-height="938" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Instruction_set_architecture" title="Instruction set architecture">Instruction set<br />architectures</a>,<br /><a href="/wiki/Processor_(computing)" title="Processor (computing)">processors</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/PDP-11_architecture" title="PDP-11 architecture">PDP-11</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>LSI-11</li> <li>F-11</li> <li><a href="/wiki/DEC_T-11" title="DEC T-11">T-11</a></li> <li><a href="/wiki/DEC_J-11" title="DEC J-11">J-11</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/VAX" title="VAX">VAX</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/DEC_V-11" title="DEC V-11">V-11</a></li> <li><a href="/wiki/MicroVAX_78032" title="MicroVAX 78032">MicroVAX 78032</a></li> <li><a href="/wiki/CVAX" title="CVAX">CVAX</a> <ul><li><a href="/wiki/CVAX#SOC" title="CVAX">SOC</a></li></ul></li> <li><a href="/wiki/Rigel_(microprocessor)" title="Rigel (microprocessor)">Rigel</a> <ul><li><a href="/wiki/Rigel_(microprocessor)#Mariah" title="Rigel (microprocessor)">Mariah</a></li></ul></li> <li><a href="/wiki/NVAX" title="NVAX">NVAX</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/DEC_Alpha" title="DEC Alpha">Alpha</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/Alpha_21064" title="Alpha 21064">Alpha 21064</a> <ul><li><a href="/wiki/Alpha_21064#Alpha_21066" title="Alpha 21064">21066</a></li> <li><a href="/wiki/Alpha_21064#Alpha_21068" title="Alpha 21064">21068</a></li></ul></li> <li><a href="/wiki/Alpha_21164" title="Alpha 21164">Alpha 21164</a> (<a href="/wiki/Alpha_21164#Alpha_21164PC_(PCA56)" title="Alpha 21164">21164PC</a>)</li> <li><a href="/wiki/Alpha_21264" title="Alpha 21264">Alpha 21264</a></li> <li><a href="/wiki/Alpha_21364" title="Alpha 21364">Alpha 21364</a></li> <li><a href="/wiki/Alpha_21464" title="Alpha 21464">Alpha 21464</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</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/DEC_PRISM" title="DEC PRISM">MicroPRISM</a></li> <li><a href="/wiki/StrongARM" title="StrongARM">StrongARM</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Computer_terminal" title="Computer terminal">Computer<br />terminals</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/VT05" title="VT05">VT05</a> (1970)</li> <li><a href="/wiki/DEC_GT40" title="DEC GT40">GT40</a> (1972)</li> <li><a href="/wiki/VT52" title="VT52">VT50/VT52</a> (1975)</li> <li><a href="/wiki/VT55" class="mw-redirect" title="VT55">VT55</a></li> <li><a href="/wiki/VT62" class="mw-redirect" title="VT62">VT62</a></li> <li><a href="/wiki/VT100" title="VT100">VT100</a> (1978)</li> <li><a href="/wiki/VT101" class="mw-redirect" title="VT101">VT101</a></li> <li><a href="/wiki/VT102" class="mw-redirect" title="VT102">VT102</a></li> <li><a href="/wiki/VT103" class="mw-redirect" title="VT103">VT103</a></li> <li><a href="/wiki/VT105" class="mw-redirect" title="VT105">VT105</a></li> <li><a href="/wiki/VT131" class="mw-redirect" title="VT131">VT131</a></li> <li><a href="/wiki/VT180" title="VT180">VT180</a></li> <li><a href="/wiki/VT220" title="VT220">VT220</a> (1983)</li> <li><a href="/wiki/VT240" class="mw-redirect" title="VT240">VT240</a></li> <li><a href="/wiki/VT241" class="mw-redirect" title="VT241">VT241</a></li> <li><a href="/wiki/VT320" title="VT320">VT320</a> (1987)</li> <li><a href="/wiki/VT330" class="mw-redirect" title="VT330">VT330</a></li> <li><a href="/wiki/VT340" class="mw-redirect" title="VT340">VT340</a></li> <li><a href="/wiki/VT420" title="VT420">VT420</a> (1990)</li> <li><a href="/wiki/VT1000" title="VT1000">VT1000</a> (1990)</li> <li><a href="/wiki/VT510" class="mw-redirect" title="VT510">VT510</a> (1993)</li> <li><a href="/wiki/VT520" title="VT520">VT520</a> (1994)</li> <li><a href="/wiki/VT525" class="mw-redirect" title="VT525">VT525</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Operating_system" title="Operating system">Operating<br />systems</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/PDP-7#Software" title="PDP-7">DECsys</a></li> <li><a href="/wiki/4K_Disk_Monitor_System" class="mw-redirect" title="4K Disk Monitor System">4K DMS</a></li> <li><a href="/wiki/Commercial_Operating_System" title="Commercial Operating System">COS</a></li> <li><a href="/wiki/TOPS-10" title="TOPS-10">TOPS-10</a></li> <li><a href="/wiki/RSX-15" class="mw-redirect" title="RSX-15">RSX-15</a></li> <li><a href="/wiki/TSS/8" title="TSS/8">TSS/8</a></li> <li><a href="/wiki/OS/8" title="OS/8">OS/8</a></li> <li><a href="/wiki/DEC_BATCH-11/DOS-11" title="DEC BATCH-11/DOS-11">DOS-11</a></li> <li><a href="/wiki/RT-11" title="RT-11">RT-11</a></li> <li><a href="/wiki/RSTS/E" title="RSTS/E">RSTS/E</a></li> <li><a href="/wiki/RSX-11" title="RSX-11">RSX-11</a> <ul><li><a href="/wiki/Interactive_Application_System" title="Interactive Application System">IAS</a></li></ul></li> <li><a href="/wiki/MUMPS#1970s" title="MUMPS">DSM-11</a></li> <li><a href="/wiki/TOPS-20" title="TOPS-20">TOPS-20</a></li> <li><a href="/wiki/OpenVMS" title="OpenVMS">VAX/VMS</a></li> <li><a class="mw-selflink selflink">VAXELN</a></li> <li><a href="/wiki/Ultrix" title="Ultrix">Ultrix</a></li> <li><a href="/wiki/DEC_MICA" title="DEC MICA">MICA</a></li> <li><a href="/wiki/Digital_UNIX" class="mw-redirect" title="Digital UNIX">Digital UNIX</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Programming_language" title="Programming language">Programming<br />languages</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/BASIC-8" title="BASIC-8">BASIC-8</a></li> <li><a href="/wiki/DIBOL" title="DIBOL">DIBOL</a></li> <li><a href="/wiki/FOCAL_(programming_language)" title="FOCAL (programming language)">FOCAL</a></li> <li><a href="/wiki/MACRO-10" title="MACRO-10">MACRO-10</a></li> <li><a href="/wiki/MACRO-11" title="MACRO-11">MACRO-11</a></li> <li><a href="/wiki/MUMPS" title="MUMPS">MUMPS</a></li> <li><a href="/wiki/VAX_MACRO" title="VAX MACRO">VAX MACRO</a></li> <li><a href="/wiki/DIGITAL_Command_Language" title="DIGITAL Command Language">DIGITAL Command Language</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Character_encoding" title="Character encoding">Character sets</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/Multinational_Character_Set" title="Multinational Character Set">Code page 1100</a> (Multinational)</li> <li><a href="/wiki/Code_page_1287" title="Code page 1287">Code page 1287</a> (Greek)</li> <li><a href="/wiki/Code_page_1288" title="Code page 1288">Code page 1288</a> (Turkish)</li> <li><a href="/wiki/DEC_Hebrew" title="DEC Hebrew">Hebrew</a></li> <li><a href="/wiki/National_Replacement_Character_Set" title="National Replacement Character Set">National Replacement</a></li> <li><a href="/wiki/DEC_RADIX_50" title="DEC RADIX 50">RADIX 50</a></li> <li><a href="/wiki/DEC_Special_Graphics" title="DEC Special Graphics">Special Graphics</a></li> <li><a href="/wiki/DEC_Technical_Character_Set" title="DEC Technical Character Set">Technical</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Bus_(computing)" title="Bus (computing)">Bus standards</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/Digital_Storage_Systems_Interconnect" title="Digital Storage Systems Interconnect">Digital Storage Systems Interconnect</a></li> <li><a href="/wiki/Massbus" title="Massbus">Massbus</a></li> <li><a href="/wiki/Q-Bus" title="Q-Bus">Q-Bus</a></li> <li><a href="/wiki/Standard_Disk_Interconnect" title="Standard Disk Interconnect">Standard Disk Interconnect</a></li> <li><a href="/wiki/Synchronous_Backplane_Interconnect" title="Synchronous Backplane Interconnect">Synchronous Backplane Interconnect</a></li> <li><a href="/wiki/TURBOchannel" title="TURBOchannel">TURBOchannel</a></li> <li><a href="/wiki/Unibus" title="Unibus">Unibus</a></li> <li><a href="/wiki/VAXBI_bus" title="VAXBI bus">VAXBI bus</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other <a href="/wiki/Computer_hardware" title="Computer hardware">hardware</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/DECtalk" title="DECtalk">DECtalk</a></li> <li><a href="/wiki/DECtape" title="DECtape">DECtape</a></li> <li><a href="/wiki/DECwriter" title="DECwriter">DECwriter</a></li> <li><a href="/wiki/Digital_Linear_Tape" title="Digital Linear Tape">Digital Linear Tape</a></li> <li><a href="/wiki/Dynamically_Redefined_Character_Set" title="Dynamically Redefined Character Set">Dynamically Redefined Character Set</a></li> <li><a href="/wiki/Firefly_(cache_coherence_protocol)" title="Firefly (cache coherence protocol)">Firefly</a></li> <li><a href="/wiki/Flip-Chip_module" title="Flip-Chip module">Flip-Chip module</a></li> <li><a href="/wiki/Gold_key_(DEC)" title="Gold key (DEC)">Gold key</a></li> <li><a href="/wiki/LK201" title="LK201">LK201</a></li> <li><a href="/wiki/LK421" title="LK421">LK421</a></li> <li><a href="/wiki/Mass_Storage_Control_Protocol" title="Mass Storage Control Protocol">Mass Storage Control Protocol</a></li> <li><a href="/wiki/PALcode" title="PALcode">PALcode</a></li> <li><a href="/wiki/RA90" title="RA90">RA90</a></li> <li><a href="/wiki/RK05" title="RK05">RK05</a></li> <li><a href="/wiki/RL02" title="RL02">RL02</a></li> <li><a href="/wiki/Star_coupler" title="Star coupler">Star coupler</a></li> <li><a href="/wiki/System_Module" title="System Module">System Module</a></li> <li><a href="/wiki/TU81" title="TU81">TU81</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related topics</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/AdvFS" title="AdvFS">AdvFS</a></li> <li><a href="/wiki/AltaVista" title="AltaVista">AltaVista</a></li> <li><a href="/wiki/Compaq" title="Compaq">Compaq</a></li> <li><i><a href="/wiki/CPU_Wars" title="CPU Wars">CPU Wars</a></i></li> <li><a href="/wiki/DECnet" title="DECnet">DECnet</a></li> <li><a href="/wiki/DECUS" title="DECUS">DECUS</a> <ul><li><a href="/wiki/HP-Interex" title="HP-Interex">HP-Interex</a></li></ul></li> <li><a href="/wiki/Digital_Federal_Credit_Union" title="Digital Federal Credit Union">Digital Federal Credit Union</a></li> <li><a href="/wiki/Dynamic_debugging_technique" title="Dynamic debugging technique">Dynamic debugging technique</a></li> <li><a href="/wiki/FX!32" title="FX!32">FX!32</a></li> <li><a href="/wiki/Local_Area_Transport" title="Local Area Transport">Local Area Transport</a></li> <li><a href="/wiki/Maintenance_Operations_Protocol" title="Maintenance Operations Protocol">Maintenance Operations Protocol</a></li> <li><a href="/wiki/On-line_Debugging_Tool" title="On-line Debugging Tool">On-line Debugging Tool</a></li> <li><a href="/wiki/PALcode" title="PALcode">PALcode</a></li> <li><a href="/wiki/Record_Management_Services" title="Record Management Services">Record Management Services</a></li> <li><a href="/wiki/ReGIS" title="ReGIS">ReGIS</a></li> <li>Sequence and Batch Language</li> <li><a href="/wiki/Sixel" title="Sixel">Sixel</a></li> <li><a href="/wiki/System_Reference_Manual" class="mw-redirect" title="System Reference Manual">System Reference Manual</a></li> <li><a href="/wiki/DEC_Systems_Research_Center" title="DEC Systems Research Center">Systems Research Center</a></li> <li><a href="/wiki/TD/SMP" title="TD/SMP">TD/SMP</a></li> <li><i><a href="/wiki/The_Ultimate_Entrepreneur" title="The Ultimate Entrepreneur">The Ultimate Entrepreneur</a></i></li> <li><a href="/wiki/VT640" title="VT640">VT640</a></li> <li><a href="/wiki/WPS-8" title="WPS-8">WPS-8</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="3"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Template"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/Symbol_template_class_pink.svg/16px-Symbol_template_class_pink.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/Symbol_template_class_pink.svg/23px-Symbol_template_class_pink.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/83/Symbol_template_class_pink.svg/31px-Symbol_template_class_pink.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Template:DEC_hardware" title="Template:DEC hardware">Computers template</a></li> <li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Category:Digital_Equipment_Corporation" title="Category:Digital Equipment Corporation">Category</a></li> <li><span class="noviewer" typeof="mw:File"><span title="Commons page"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/24px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span> <a 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href="/wiki/Template:Real-time_operating_systems" title="Template:Real-time operating systems"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Real-time_operating_systems" title="Template talk:Real-time operating systems"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Real-time_operating_systems" title="Special:EditPage/Template:Real-time operating systems"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Real-time_operating_systems_(RTOS)" style="font-size:114%;margin:0 4em"><a href="/wiki/Real-time_operating_system" title="Real-time operating system">Real-time operating systems</a> (RTOS)</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Operating_system" title="Operating system">Operating<br />systems</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/POSIX" title="POSIX">POSIX</a> support</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/Unix-like" title="Unix-like">Unix-like</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><i><a href="/wiki/DNIX" title="DNIX">DNIX</a></i></li> <li><a href="/wiki/Junos_OS" title="Junos OS">Junos OS</a></li> <li><a href="/wiki/LynxOS" title="LynxOS">LynxOS</a></li> <li><i><a href="/wiki/Multi-Environment_Real-Time" title="Multi-Environment Real-Time">Multi-Environment Real-Time</a></i>^ (<i>MERT</i> – <i>Unix-RT</i>)</li> <li><i><a href="/wiki/OS2000" title="OS2000">OS2000</a></i></li> <li><a href="/wiki/QNX" title="QNX">QNX</a>^</li> <li><a href="/wiki/Real-Time_Linux" class="mw-redirect" title="Real-Time Linux">Real-Time Linux</a>°</li> <li><a href="/wiki/RTLinux" title="RTLinux">RTLinux</a>°</li> <li><i><a href="/wiki/UNOS_(operating_system)" title="UNOS (operating system)">UNOS</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/LiteOS" title="LiteOS">LiteOS</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><i><a href="/wiki/LiteOS" title="LiteOS">LiteOS</a></i>°</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Partial</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/ChorusOS" title="ChorusOS">ChorusOS</a></i>^</li> <li><a href="/wiki/Integrity_(operating_system)" title="Integrity (operating system)">Integrity</a>^</li> <li><a href="/wiki/Nucleus_RTOS" title="Nucleus RTOS">Nucleus RTOS</a>^</li> <li><a href="/wiki/NuttX" title="NuttX">NuttX</a>^°</li> <li><a href="/wiki/Operating_System_Embedded" class="mw-redirect" title="Operating System Embedded">Operating System Embedded</a>^ (OSE)</li> <li><a href="/wiki/PX5_RTOS" title="PX5 RTOS">PX5 RTOS</a>^</li> <li><a href="/wiki/RIOT_(operating_system)" title="RIOT (operating system)">RIOT</a>^°</li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/TRON_project" title="TRON project">TRON</a> support</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><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/ITRON_project" title="ITRON project">ITRON project</a></li> <li><a href="/wiki/T-Kernel" title="T-Kernel">T-Kernel</a> <ul><li><a href="/wiki/Micro_T-Kernel" title="Micro T-Kernel">Micro T-Kernel</a></li> <li><a href="/wiki/T-Engine_Forum" title="T-Engine Forum">T-Engine Forum</a> (organization)</li> <li><a href="/wiki/T-License" title="T-License">T-License</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Partial</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/ECos" title="ECos">eCos</a>°</li> <li><a href="/wiki/RTEMS" title="RTEMS">RTEMS</a>°</li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Capability-based_security" title="Capability-based security">Capability-based</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><i><a href="/wiki/EROS_(microkernel)" title="EROS (microkernel)">EROS</a></i>^°</li> <li><a href="/wiki/SeL4" class="mw-redirect" title="SeL4">seL4</a>^°</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Java_virtual_machine" title="Java virtual machine">Java virtual machine</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><i><a href="/wiki/JavaOS#Chorus/Jazz" title="JavaOS">Chorus/Jazz</a></i>^ (<i><a href="/wiki/JavaOS" title="JavaOS">JavaOS</a></i> + <i><a href="/wiki/ChorusOS" title="ChorusOS">ChorusOS</a></i>^)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/DOS" title="DOS">DOS</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><i><a href="/wiki/Multiuser_DOS" title="Multiuser DOS">Multiuser DOS</a></i> <ul><li><i><a href="/wiki/Concurrent_DOS" class="mw-redirect" title="Concurrent DOS">Concurrent DOS</a></i></li> <li><i><a href="/wiki/FlexOS" title="FlexOS">FlexOS</a></i></li> <li><i><a href="/wiki/REAL/32" class="mw-redirect" title="REAL/32">REAL/32</a></i></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/L4_microkernel_family" title="L4 microkernel family">L4</a> kernel</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/L4Linux" title="L4Linux">L<sup>4</sup>Linux</a>^°</li> <li><a href="/wiki/PikeOS" title="PikeOS">PikeOS</a>^</li> <li><i><a href="/wiki/REX_OS" title="REX OS">REX OS</a></i>^</li> <li><a href="/wiki/Wombat_(operating_system)" title="Wombat (operating system)">Wombat</a>^°</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Psion_(company)" title="Psion (company)">Psion</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><i><a href="/wiki/EKA2" title="EKA2">EKA2</a></i>^° kernel → <i><a href="/wiki/Symbian" title="Symbian">Symbian</a> OS</i>^°</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Microsoft" title="Microsoft">Microsoft</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/ThreadX" title="ThreadX">ThreadX</a>^</li> <li><a href="/wiki/Windows_Embedded_Compact" title="Windows Embedded Compact">Windows Embedded Compact</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/IBM" title="IBM">IBM</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><i><a href="/wiki/4680_OS" class="mw-redirect" title="4680 OS">4680 OS</a></i></li> <li><i><a href="/wiki/4690_Operating_System" title="4690 Operating System">4690 OS</a></i></li> <li><a href="/wiki/Transaction_Processing_Facility" title="Transaction Processing Facility">Transaction Processing Facility</a> (TPF)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Texas_Instruments" title="Texas Instruments">Texas Instruments</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><i><a href="/wiki/DSOS" title="DSOS">DSOS</a></i></li> <li><a href="/wiki/TI-RTOS#RTOS_kernel_overview" title="TI-RTOS">TI-RTOS Kernel</a>^°</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Digital_Equipment_Corporation" title="Digital Equipment Corporation">DEC</a> <a href="/wiki/PDP-11" title="PDP-11">PDP-11</a> <a href="/wiki/VAX" title="VAX">VAX</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><i><a href="/wiki/RSX-11" title="RSX-11">RSX-11</a></i></li> <li><i><a href="/wiki/RT-11" title="RT-11">RT-11</a></i></li> <li><i><a class="mw-selflink selflink">VAXELN</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Low resource</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/ChibiOS/RT" title="ChibiOS/RT">ChibiOS/RT</a>^°</li> <li><a href="/wiki/Contiki" title="Contiki">Contiki</a>°</li> <li><a href="/wiki/ERIKA_Enterprise" title="ERIKA Enterprise">ERIKA Enterprise</a>°</li> <li>FunkOS°</li> <li><a href="/wiki/Apache_Mynewt" title="Apache Mynewt">Mynewt</a>°</li> <li><i><a href="/wiki/Nano-RK" title="Nano-RK">Nano-RK</a></i>°</li> <li><a href="/wiki/OpenComRTOS" title="OpenComRTOS">OpenComRTOS</a>^</li> <li><a href="/wiki/PX5_RTOS" title="PX5 RTOS">PX5 RTOS</a>^</li> <li><a href="/wiki/RT-Thread" title="RT-Thread">RT-Thread</a>° Nano</li> <li><a href="/wiki/RIOT_(operating_system)" title="RIOT (operating system)">RIOT</a>°</li> <li><a href="/wiki/ThreadX" title="ThreadX">ThreadX</a>^</li> <li><a href="/wiki/Zephyr_(operating_system)" title="Zephyr (operating system)">Zephyr</a>^°</li></ul> </div></td></tr></tbody></table><div> <ul><li><i><a href="/wiki/BeRTOS" title="BeRTOS">BeRTOS</a></i>^°</li> <li><i><a href="/wiki/DioneOS" title="DioneOS">DioneOS</a></i></li> <li><a href="/wiki/Segger_Microcontroller_Systems" title="Segger Microcontroller Systems">embOS</a></li> <li><a href="/wiki/FreeRTOS" title="FreeRTOS">FreeRTOS</a>^°</li> <li><a href="/wiki/Micro-Controller_Operating_Systems" title="Micro-Controller Operating Systems">µC/OS</a>^°</li> <li><a href="/wiki/Green_Hills_Software#Real-time_operating_systems" title="Green Hills Software">µ-velOSity</a>^</li> <li><a href="/wiki/MQX" title="MQX">MQX</a>^</li> <li><a href="/wiki/OS-9" title="OS-9">OS-9</a> (<a href="/wiki/Microware" title="Microware">Microware</a>)</li> <li><a href="/wiki/Phantom_OS" title="Phantom OS">Phantom OS</a>^°</li> <li><i><a href="/wiki/PSOS_(real-time_operating_system)" title="PSOS (real-time operating system)">pSOS</a></i></li> <li><i><a href="/wiki/RMX_(operating_system)" title="RMX (operating system)">RMX</a></i></li> <li><a href="/wiki/RT-Thread" title="RT-Thread">RT-Thread</a>° Standard</li> <li><a href="/wiki/ScreenOS" title="ScreenOS">ScreenOS</a></li> <li><i><a href="/wiki/Sintran_III" title="Sintran III">Sintran III</a></i></li> <li><i><a href="/wiki/THEOS" title="THEOS">THEOS</a></i></li> <li><i><a href="/wiki/Thoth_(operating_system)" title="Thoth (operating system)">Thoth</a></i>^ → <i><a href="/wiki/Harmony_(operating_system)" title="Harmony (operating system)">Harmony</a></i>^</li> <li><a href="/wiki/Versatile_Real-Time_Executive" title="Versatile Real-Time Executive">VRTX</a>^</li> <li><a href="/wiki/VxWorks" title="VxWorks">VxWorks</a></li> <li><a href="/wiki/EulerOS" title="EulerOS">UniProton</a></li></ul></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Software_framework" title="Software framework">Frameworks</a>, <a href="/wiki/Software_development_kit" title="Software development kit">kits</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <li><a href="/wiki/Robot_Operating_System" title="Robot Operating System">Robot Operating System</a>° 2</li> <li><a href="/wiki/RTAI" title="RTAI">RTAI</a>°</li> <li><a href="/wiki/TI-RTOS" title="TI-RTOS">TI-RTOS</a>^°</li> <li><a href="/wiki/Xenomai" title="Xenomai">Xenomai</a>°</li> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Programmer" title="Programmer">Developers</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/Gordon_Bell_(QNX)" title="Gordon Bell (QNX)">Gordon Bell</a></li> <li><a href="/wiki/David_Cheriton" title="David Cheriton">David Cheriton</a></li> <li><a href="/wiki/Dave_Cutler" title="Dave Cutler">Dave Cutler</a></li> <li><a href="/wiki/Dan_Dodge" title="Dan Dodge">Dan Dodge</a></li> <li><a href="/wiki/Adam_Dunkels" title="Adam Dunkels">Adam Dunkels</a></li> <li><a href="/wiki/Ken_Sakamura" title="Ken Sakamura">Ken Sakamura</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><i>Italics</i> <b>= discontinued</b></li> <li><b>^ = <a href="/wiki/Microkernel" title="Microkernel">Microkernel</a></b></li> <li><b>° = <a href="/wiki/Open-source_software" title="Open-source software">Open-source software</a></b><br /><span class="noviewer" typeof="mw:File"><span title="List-Class article"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/16px-Symbol_list_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/23px-Symbol_list_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/31px-Symbol_list_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <b><a href="/wiki/Comparison_of_real-time_operating_systems" title="Comparison of real-time operating systems">Comparison</a></b> <span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" 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