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id="toc-Other" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Other"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Other</span> </div> </a> <ul id="toc-Other-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notes"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>Notes</span> </div> </a> <ul id="toc-Notes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 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src="//upload.wikimedia.org/wikipedia/commons/thumb/2/27/IBM_4381.jpg/300px-IBM_4381.jpg" decoding="async" width="300" height="169" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/27/IBM_4381.jpg/450px-IBM_4381.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/27/IBM_4381.jpg/600px-IBM_4381.jpg 2x" data-file-width="6000" data-file-height="3378" /></a><figcaption>IBM 4381</figcaption></figure> <p>The <b>IBM 4300 series</b><sup id="cite_ref-DE4321_1-0" class="reference"><a href="#cite_note-DE4321-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-IB4331_2-0" class="reference"><a href="#cite_note-IB4331-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-IB4341_3-0" class="reference"><a href="#cite_note-IB4341-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-IB4361_4-0" class="reference"><a href="#cite_note-IB4361-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-IB4381_5-0" class="reference"><a href="#cite_note-IB4381-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> are mid-range systems compatible with <a href="/wiki/IBM_System/370" title="IBM System/370">System/370</a><sup id="cite_ref-IB4331_2-1" class="reference"><a href="#cite_note-IB4331-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> that were sold from 1979 through 1992. They featured modest electrical and cooling requirements, and thus did not require a data center environment. They had a disruptive effect on the market, allowing customers to provide internal IBM computing services at a cost point lower than commercial <a href="/wiki/Time-sharing" title="Time-sharing">time-sharing</a> services. All 4300 processors used a 3278-2A, 3279-C or 3205 display console rather than a 3210 or 3215 keyboard/printer console. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Models">Models</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IBM_4300&action=edit&section=1" title="Edit section: Models"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Each model - 4331, 4341, 4361, and 4381 - had various sub-models, such as the 4341 model 1 (or 4341-1) and 4341 model 2 (4341-2). </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:MNACTEC_keyboards_(30316690493).jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/MNACTEC_keyboards_%2830316690493%29.jpg/220px-MNACTEC_keyboards_%2830316690493%29.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/MNACTEC_keyboards_%2830316690493%29.jpg/330px-MNACTEC_keyboards_%2830316690493%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8e/MNACTEC_keyboards_%2830316690493%29.jpg/440px-MNACTEC_keyboards_%2830316690493%29.jpg 2x" data-file-width="4032" data-file-height="3024" /></a><figcaption>IBM 4341 with <a href="/wiki/IBM_3270" title="IBM 3270">3278-2A terminal</a></figcaption></figure> <p>The 4381-13 through 4381-24 (announced in 1987) were entry-level machines for the <a href="/wiki/IBM_System/370#Subsequent_enhancements" title="IBM System/370">370-XA</a> architecture. They were positioned between the <a href="/wiki/IBM_9370" title="IBM 9370">IBM 9370</a> and <a href="/wiki/IBM_3090" title="IBM 3090">IBM 3090</a> in performance at the time of announcement. </p><p>The 4381-3, 4381-14, 4381-24 and 4381-92 are <a href="/wiki/Symmetric_multiprocessing" title="Symmetric multiprocessing">dual-CPU</a> models. Other models included 1, 2, 11, 12, 13, 21, 22, 23, 90 and 91. </p> <table class="wikitable"> <caption> </caption> <tbody><tr> <th>Model </th> <th>Announced </th> <th>Withdrawn </th> <th>Max. memory </th> <th>Approximate performance </th></tr> <tr> <td>4331 </td> <td>1979 </td> <td>1981 </td> <td>8 MB </td> <td>4 × 370/115 </td></tr> <tr> <td>4341 </td> <td>1979 </td> <td>1986 </td> <td>16 MB </td> <td>3.2 × 370/138 </td></tr> <tr> <td>4361 </td> <td>1983 </td> <td>1987 </td> <td>12 MB </td> <td>3 × 4331 </td></tr> <tr> <td>4381 </td> <td>1983 </td> <td>1992 </td> <td>64 MB </td> <td>9 × 4341 </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="IBM_4321">IBM 4321</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IBM_4300&action=edit&section=2" title="Edit section: IBM 4321"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <b>IBM 4321</b> was announced on 18 November 1981.<sup id="cite_ref-DE4321_1-1" class="reference"><a href="#cite_note-DE4321-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="IBM_4331">IBM 4331</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IBM_4300&action=edit&section=3" title="Edit section: IBM 4331"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <b>IBM 4331</b> (and the 4341) were announced on 30 January 1979.<sup id="cite_ref-IB4331_2-2" class="reference"><a href="#cite_note-IB4331-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> It came with an integrated adapter that permitted attaching up to 16 of two newly introduced <a href="/wiki/Direct-access_storage_device" title="Direct-access storage device">direct-access storage devices</a> (DASD): </p> <ul><li>The <b>IBM 3310</b>, described as having "a storage capacity of 64.5 million characters", was to be used with "Storage disks .. sealed to reduce the possibility of damage, loss, misuse or contamination".</li> <li>The <b>IBM 3370</b> with up to 571 million characters could also be used with an IBM 4341.</li></ul> <p>The 4331 was withdrawn on 18 November 1981. </p> <div class="mw-heading mw-heading2"><h2 id="IBM_4341">IBM 4341</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IBM_4300&action=edit&section=4" title="Edit section: IBM 4341"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <b>IBM 4341</b> (and the 4331) were announced on 30 January 1979.<sup id="cite_ref-IB4341_3-1" class="reference"><a href="#cite_note-IB4341-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Like the 4331, it came with an integrated adapter that permitted attaching up to 16 of the newly introduced IBM 3370 DASD. The 4341 did not support the much lower capacity IBM 3310. The 4341 Introduced the Extended Control Program Support:VM (ECPS:VM), Extended Control Program Support:VS1 (ECPS:VS1) and Extended Control Program Support:Virtual Storage Extended<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><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> (ECPS:VSE) features. The 4341-2 introduced the Extended Control Program Support:MVS<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><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> (ECPS:MVS) option, a subset of System/370 extended facility. </p><p>On 20 October 1982, IBM announced a new entry-level 4341 model, Model Group 9 and a new top-of-the-line 4341, Model Group 12. Model Group 12 included the Dual Address Space (DAS) facility. </p><p>The 4341 was withdrawn on 11 February 1986. </p> <div class="mw-heading mw-heading2"><h2 id="IBM_4361">IBM 4361</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IBM_4300&action=edit&section=5" title="Edit section: IBM 4361"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <b>IBM 4361</b> Model Groups 4 and 5 were announced on 15 September 1983. </p><p>Model Group 3 was announced the following year on 12 September 1984. </p> <div class="mw-heading mw-heading3"><h3 id="New_features">New features</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IBM_4300&action=edit&section=6" title="Edit section: New features"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Among the new/optional features for the 4361 were: </p> <ul><li>Auto-Start—automatically turns on the processor by telephone via the Remote Operator Control Facility or at a predetermined time and day of the week. The processor powers on and proceeds with initial microcode load, sets the clock and loads the system.</li></ul> <div class="mw-heading mw-heading4"><h4 id="APL_keyboard">APL keyboard</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IBM_4300&action=edit&section=7" title="Edit section: APL keyboard"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>A Workstation Adapter that includes support for terminals with <a href="/wiki/APL_(programming_language)" title="APL (programming language)">APL</a> keyboards, supporting the <a href="/wiki/APL_syntax_and_symbols" title="APL syntax and symbols">APL syntax and symbols</a>.</li></ul> <div class="mw-heading mw-heading4"><h4 id="High-Accuracy_Arithmetic_Facility">High-Accuracy Arithmetic Facility</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IBM_4300&action=edit&section=8" title="Edit section: High-Accuracy Arithmetic Facility"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>While <a href="/wiki/Floating-point_arithmetic" title="Floating-point arithmetic">floating-point arithmetic</a> has long been part of computing history,<sup id="cite_ref-NB_1_10-0" class="reference"><a href="#cite_note-NB_1-10"><span class="cite-bracket">[</span>nb 1<span class="cite-bracket">]</span></a></sup> and was present in <a href="/wiki/System/360" class="mw-redirect" title="System/360">System/360</a>, this feature's advancement, conceptualization of which, as <a href="/wiki/Karlsruhe_Accurate_Arithmetic" title="Karlsruhe Accurate Arithmetic">Karlsruhe Accurate Arithmetic</a>, had been under development for decades,<sup id="cite_ref-Lortz_1971_11-0" class="reference"><a href="#cite_note-Lortz_1971-11"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> was implemented as an optional feature on the 4361.<sup id="cite_ref-IB4361_4-1" class="reference"><a href="#cite_note-IB4361-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-NB_2_12-0" class="reference"><a href="#cite_note-NB_2-12"><span class="cite-bracket">[</span>nb 2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Kirchner_1988_13-0" class="reference"><a href="#cite_note-Kirchner_1988-13"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p><p>The 4361 was withdrawn on 17 February 1987. </p> <div class="mw-heading mw-heading2"><h2 id="IBM_4381">IBM 4381</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IBM_4300&action=edit&section=9" title="Edit section: IBM 4381"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <b>IBM 4381</b> had a greater longevity than any of the above systems. </p><p>Model Groups 1 and 2 were announced Sep 15, 1983 and withdrawn on 11 February 1986. </p><p>Model Group 3 was announced on 25 October 1984 and withdrawn on 11 February 1986. Model Groups 11, 12, 13 and 14 were announced on 11 February 1986. </p><p>Model Groups 21, 22, 23 and 24 were announced on 19 May 1987 and withdrawn on 19 August 1992. </p> <div class="mw-heading mw-heading2"><h2 id="Operating_systems">Operating systems</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IBM_4300&action=edit&section=10" title="Edit section: Operating systems"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>New releases of: </p> <ul><li>Disk Operating System/Virtual Storage Extended (<a href="/wiki/VSE_(operating_system)" title="VSE (operating system)">DOS/VSE</a>)<sup id="cite_ref-NB_3_14-0" class="reference"><a href="#cite_note-NB_3-14"><span class="cite-bracket">[</span>nb 3<span class="cite-bracket">]</span></a></sup></li> <li>Virtual Machine Facility/370 (<a href="/wiki/VM_(operating_system)" title="VM (operating system)">VM/370</a>) Release 6</li> <li>Operating System/Virtual Storage 1 (<a href="/wiki/OS/VS1" title="OS/VS1">OS/VS1</a>) Release 7</li></ul> <p>supported the 4300 series as well as other System/370-compatible processors. </p><p>For the 4321 and 4331: </p> <ul><li><a href="/wiki/DOS/360_and_successors#SSX/VSE" title="DOS/360 and successors">Small Systems Executive/Virtual Storage Extended</a> (SSX/VSE), a simplified version of the DOS/VSE operating system for the IBM 4321 and IBM 4331 processors.<sup id="cite_ref-IBM4300.CW81_15-0" class="reference"><a href="#cite_note-IBM4300.CW81-15"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup></li></ul> <div class="mw-heading mw-heading2"><h2 id="Other">Other</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IBM_4300&action=edit&section=11" title="Edit section: Other"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Hughes Aircraft Company was the first IBM customer to install Endicott's initial IBM 4341 processor<sup id="cite_ref-Endi.80_16-0" class="reference"><a href="#cite_note-Endi.80-16"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup></li> <li>The IBM 4331 Model 2 was developed by the Boeblingen lab and manufactured in Endicott.<sup id="cite_ref-Endi.80_16-1" class="reference"><a href="#cite_note-Endi.80-16"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup></li> <li>The IBM 4341 Model 2 was developed by the intermediate systems group, and manufactured by SPD, in Endicott.<sup id="cite_ref-Endi.80_16-2" class="reference"><a href="#cite_note-Endi.80-16"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup></li> <li>Subsequent processors had development and manufacturing activities in <a href="/wiki/Endicott,_New_York" title="Endicott, New York">Endicott</a>,<sup id="cite_ref-NB_4_17-0" class="reference"><a href="#cite_note-NB_4-17"><span class="cite-bracket">[</span>nb 4<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Havant" title="Havant">Havant</a>, <a href="/wiki/Boeblingen" class="mw-redirect" title="Boeblingen">Boeblingen</a>, <a href="/wiki/Valencia" title="Valencia">Valencia</a>, and <a href="/wiki/Sumare" class="mw-redirect" title="Sumare">Sumare</a>.</li></ul> <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=IBM_4300&action=edit&section=12" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/List_of_IBM_products" title="List of IBM products">List of IBM products</a></li> <li><a href="/wiki/IBM_System/360" title="IBM System/360">IBM System/360</a></li> <li><a href="/wiki/IBM_System/370" title="IBM System/370">IBM System/370</a></li> <li><a href="/wiki/Karlsruhe_Accurate_Arithmetic" title="Karlsruhe Accurate Arithmetic">Karlsruhe Accurate Arithmetic</a> (KAA) for the IBM 4361<sup id="cite_ref-CW_18-0" class="reference"><a href="#cite_note-CW-18"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup></li> <li><a href="https://en.wiktionary.org/wiki/molly-guard" class="extiw" title="wiktionary:molly-guard">Molly-guard</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IBM_4300&action=edit&section=13" title="Edit section: Notes"><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"><ol class="references"> <li id="cite_note-NB_1-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-NB_1_10-0">^</a></b></span> <span class="reference-text">1955, <a href="/wiki/IBM_650" title="IBM 650">IBM 650</a>, 1960s, <a href="/wiki/UNIVAC_1100/2200_series" title="UNIVAC 1100/2200 series">UNIVAC 1100</a>, <a href="/wiki/IBM_7094" class="mw-redirect" title="IBM 7094">IBM 7094</a>.</span> </li> <li id="cite_note-NB_2-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-NB_2_12-0">^</a></b></span> <span class="reference-text">Described by IBM as "<b>High-Accuracy Arithmetic Facility</b>: Allows computational procedures with algorithmic verification of results." and adds "New floating-point instructions are implemented for computation of basic arithmetic operations and the scalar product with maximum accuracy."</span> </li> <li id="cite_note-NB_3-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-NB_3_14-0">^</a></b></span> <span class="reference-text">The announcement noted "based on <a href="/wiki/DOS/360_and_successors" title="DOS/360 and successors">DOS/VS</a>".</span> </li> <li id="cite_note-NB_4-17"><span class="mw-cite-backlink"><b><a href="#cite_ref-NB_4_17-0">^</a></b></span> <span class="reference-text">Endicott is best known as the "Birthplace of IBM".</span> </li> </ol></div></div> <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=IBM_4300&action=edit&section=14" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-DE4321-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-DE4321_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-DE4321_1-1"><sup><i><b>b</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="https://web.archive.org/web/20100820215608/http://www-03.ibm.com/ibm/history/exhibits/dpd50/dpd50_chronology5.html">"DPD chronology"</a>. <i>IBM Archives</i>. <a href="/wiki/IBM" title="IBM">IBM</a>. 2003-01-23. Archived from <a rel="nofollow" class="external text" href="https://www-03.ibm.com/ibm/history/exhibits/dpd50/dpd50_chronology5.html">the original</a> on 2010-08-20.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=IBM+Archives&rft.atitle=DPD+chronology&rft.date=2003-01-23&rft_id=https%3A%2F%2Fwww-03.ibm.com%2Fibm%2Fhistory%2Fexhibits%2Fdpd50%2Fdpd50_chronology5.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" class="Z3988"></span></span> </li> <li id="cite_note-IB4331-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-IB4331_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-IB4331_2-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-IB4331_2-2"><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 class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20050311004512/http://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP4331.html">"4331 Processor"</a>. <i>IBM Archives</i>. <a href="/wiki/IBM" title="IBM">IBM</a>. 2003-01-23. Archived from <a rel="nofollow" class="external text" href="https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP4331.html">the original</a> on 2005-03-11.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=IBM+Archives&rft.atitle=4331+Processor&rft.date=2003-01-23&rft_id=https%3A%2F%2Fwww-03.ibm.com%2Fibm%2Fhistory%2Fexhibits%2Fmainframe%2Fmainframe_PP4331.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" class="Z3988"></span></span> </li> <li id="cite_note-IB4341-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-IB4341_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-IB4341_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 class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20050311021552/http://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP4341.html">"4341 Processor"</a>. <i>IBM Archives</i>. <a href="/wiki/IBM" title="IBM">IBM</a>. 2003-01-23. Archived from <a rel="nofollow" class="external text" href="https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP4341.html">the original</a> on 2005-03-11.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=IBM+Archives&rft.atitle=4341+Processor&rft.date=2003-01-23&rft_id=https%3A%2F%2Fwww-03.ibm.com%2Fibm%2Fhistory%2Fexhibits%2Fmainframe%2Fmainframe_PP4341.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" class="Z3988"></span></span> </li> <li id="cite_note-IB4361-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-IB4361_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-IB4361_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://archive.today/20130426190723/http://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP4361.html">"4361 Processor"</a>. <i>IBM Archives</i>. <a href="/wiki/IBM" title="IBM">IBM</a>. 2003-01-23. Archived from <a rel="nofollow" class="external text" href="https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP4361.html">the original</a> on 2013-04-26.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=IBM+Archives&rft.atitle=4361+Processor&rft.date=2003-01-23&rft_id=https%3A%2F%2Fwww-03.ibm.com%2Fibm%2Fhistory%2Fexhibits%2Fmainframe%2Fmainframe_PP4361.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" class="Z3988"></span></span> </li> <li id="cite_note-IB4381-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-IB4381_5-0">^</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://web.archive.org/web/20050311022010/http://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP4381.html">"4381 Processor"</a>. <i>IBM Archives</i>. <a href="/wiki/IBM" title="IBM">IBM</a>. 2003-01-23. Archived from <a rel="nofollow" class="external text" href="https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP4381.html">the original</a> on 2005-03-11.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=IBM+Archives&rft.atitle=4381+Processor&rft.date=2003-01-23&rft_id=https%3A%2F%2Fwww-03.ibm.com%2Fibm%2Fhistory%2Fexhibits%2Fmainframe%2Fmainframe_PP4381.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" 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="http://bitsavers.org/pdf/ibm/4341/GC20-1877-0_A_Guide_to_the_IBM_4341_Processor_Apr79.pdf#page=12">"Section 01: Highlights"</a> <span class="cs1-format">(PDF)</span>. <a rel="nofollow" class="external text" href="http://bitsavers.org/pdf/ibm/4341/GC20-1877-0_A_Guide_to_the_IBM_4341_Processor_Apr79.pdf"><i>A Guide to the IBM 4341 Processor</i></a> <span class="cs1-format">(PDF)</span>. Systems (First ed.). <a href="/wiki/IBM" title="IBM">IBM</a>. April 1979. p. <a rel="nofollow" class="external text" href="http://bitsavers.org/pdf/ibm/4341/GC20-1877-0_A_Guide_to_the_IBM_4341_Processor_Apr79.pdf#page=13">2</a>. GC20-1877-0<span class="reference-accessdate">. Retrieved <span class="nowrap">2023-03-30</span></span>. <q>ECPS:VSE mode provides an alternative method for translating addresses in instructions during instruction execution and, in addition, provides for translating addresses in channel command words during I/O operations. The address translation technique used in ECPS:VSE mode permits only one virtual storage of up to 16 million bytes to be supported.</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.atitle=Section+01%3A+Highlights&rft.btitle=A+Guide+to+the+IBM+4341+Processor&rft.series=Systems&rft.pages=2&rft.edition=First&rft.pub=IBM&rft.date=1979-04&rft_id=http%3A%2F%2Fbitsavers.org%2Fpdf%2Fibm%2F4341%2FGC20-1877-0_A_Guide_to_the_IBM_4341_Processor_Apr79.pdf%23page%3D12&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" 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 book cs1"><a rel="nofollow" class="external text" href="http://bitsavers.org/pdf/ibm/4300/GA22-7070-1_4300_Processors_PrincOps_ECPS_VSE_Mode_Sep80.pdf"><i>IBM 4300 Processors Principles of Operation for ECPS: VSE Mode</i></a> <span class="cs1-format">(PDF)</span>. Systems (Second ed.). <a href="/wiki/IBM" title="IBM">IBM</a>. September 1980. GA22-7070-1<span class="reference-accessdate">. Retrieved <span class="nowrap">2023-03-30</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=IBM+4300+Processors+Principles+of+Operation+for+ECPS%3A+VSE+Mode&rft.series=Systems&rft.edition=Second&rft.pub=IBM&rft.date=1980-09&rft_id=http%3A%2F%2Fbitsavers.org%2Fpdf%2Fibm%2F4300%2FGA22-7070-1_4300_Processors_PrincOps_ECPS_VSE_Mode_Sep80.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" 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="CITEREFS370-MVS" class="citation book cs1"><a rel="nofollow" class="external text" href="http://bitsavers.org/pdf/ibm/370/MVS/GA22-7079-1_IBM_System_370_Assists_for_MVS_Oct81.pdf"><i>IBM System/370 Assists for MVS</i></a> <span class="cs1-format">(PDF)</span> (Second ed.). <a href="/wiki/IBM" title="IBM">IBM</a>. October 1981. GA22-7079-1.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=IBM+System%2F370+Assists+for+MVS&rft.edition=Second&rft.pub=IBM&rft.date=1981-10&rft_id=http%3A%2F%2Fbitsavers.org%2Fpdf%2Fibm%2F370%2FMVS%2FGA22-7079-1_IBM_System_370_Assists_for_MVS_Oct81.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" 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 class="citation book cs1"><a rel="nofollow" class="external text" href="http://bitsavers.org/pdf/ibm/370/MVS/GA22-7079-1_IBM_System_370_Assists_for_MVS_Oct81.pdf"><i>IBM System/370 Extended Facility and ECPS:MVS</i></a> <span class="cs1-format">(PDF)</span>. Systems (Second ed.). <a href="/wiki/IBM" title="IBM">IBM</a>. November 1980. GA22-7072-1<span class="reference-accessdate">. Retrieved <span class="nowrap">2023-03-30</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=IBM+System%2F370+Extended+Facility+and+ECPS%3AMVS&rft.series=Systems&rft.edition=Second&rft.pub=IBM&rft.date=1980-11&rft_id=http%3A%2F%2Fbitsavers.org%2Fpdf%2Fibm%2F370%2FMVS%2FGA22-7079-1_IBM_System_370_Assists_for_MVS_Oct81.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" class="Z3988"></span></span> </li> <li id="cite_note-Lortz_1971-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-Lortz_1971_11-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLortz1971" class="citation book cs1 cs1-prop-foreign-lang-source">Lortz, Bruno (1971). <i>Eine Langzahlarithmetik mit optimaler einseitiger Rundung</i> [<i>A large-number arithmetic with optimal one-side rounding</i>] (Ph.D. thesis) (in German). <a href="/wiki/Universit%C3%A4t_Karlsruhe" class="mw-redirect" title="Universität Karlsruhe">Universität Karlsruhe</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Eine+Langzahlarithmetik+mit+optimaler+einseitiger+Rundung&rft.pub=Universit%C3%A4t+Karlsruhe&rft.date=1971&rft.aulast=Lortz&rft.aufirst=Bruno&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" class="Z3988"></span></span> </li> <li id="cite_note-Kirchner_1988-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-Kirchner_1988_13-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKirchnerKulisch1988" class="citation journal cs1">Kirchner, R.; <a href="/wiki/Ulrich_W._Kulisch" class="mw-redirect" title="Ulrich W. Kulisch">Kulisch, Ulrich W.</a> (1988). "Accurate arithmetic for vector processors". <i>Journal of Parallel and Distributed Computing</i>. <b>5</b> (3): 250–70. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2F0743-7315%2888%2990020-2">10.1016/0743-7315(88)90020-2</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Journal+of+Parallel+and+Distributed+Computing&rft.atitle=Accurate+arithmetic+for+vector+processors&rft.volume=5&rft.issue=3&rft.pages=250-70&rft.date=1988&rft_id=info%3Adoi%2F10.1016%2F0743-7315%2888%2990020-2&rft.aulast=Kirchner&rft.aufirst=R.&rft.au=Kulisch%2C+Ulrich+W.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" class="Z3988"></span></span> </li> <li id="cite_note-IBM4300.CW81-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-IBM4300.CW81_15-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFTom_Henkel1981" class="citation news cs1">Tom Henkel (1981-11-30). "Multiple Uses of IBM 4300 Muddy Market". <i><a href="/wiki/Computerworld" title="Computerworld">Computerworld</a></i>. pp. 6, 8.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Computerworld&rft.atitle=Multiple+Uses+of+IBM+4300+Muddy+Market&rft.pages=6%2C+8&rft.date=1981-11-30&rft.au=Tom+Henkel&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" class="Z3988"></span></span> </li> <li id="cite_note-Endi.80-16"><span class="mw-cite-backlink">^ <a href="#cite_ref-Endi.80_16-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Endi.80_16-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Endi.80_16-2"><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 class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20070109174246/http://www-03.ibm.com/ibm/history/exhibits/endicott/endicott_chronology1980.html">"Endicott chronology"</a>. <i>IBM Archives</i>. <a href="/wiki/IBM" title="IBM">IBM</a>. 2003-01-23. Archived from <a rel="nofollow" class="external text" href="https://www-03.ibm.com/ibm/history/exhibits/endicott/endicott_chronology1980.html">the original</a> on 2007-01-09.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=IBM+Archives&rft.atitle=Endicott+chronology&rft.date=2003-01-23&rft_id=https%3A%2F%2Fwww-03.ibm.com%2Fibm%2Fhistory%2Fexhibits%2Fendicott%2Fendicott_chronology1980.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" class="Z3988"></span></span> </li> <li id="cite_note-CW-18"><span class="mw-cite-backlink"><b><a href="#cite_ref-CW_18-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFCW1985" class="citation journal cs1 cs1-prop-foreign-lang-source">CW (1985-12-20). <a rel="nofollow" class="external text" href="http://www.computerwoche.de/a/rechner-liefern-keine-korrekten-ergebnisse,1172144">"Rechner liefern keine korrekten Ergebnisse - Neue Arithmetik der Karlsruher Forschungsgruppe Kulisch in der 4361 realisiert"</a> [Computers don't deliver exact results - Karlsruhe research team Kulisch implements new computer arithmetic for the IBM 4361]. <i><a href="/wiki/Computerwoche" title="Computerwoche">Computerwoche</a></i> (in German). Karlsruhe, Germany: <a href="/wiki/IDG_Business_Media_GmbH" class="mw-redirect" title="IDG Business Media GmbH">IDG Business Media GmbH</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160530220246/http://www.computerwoche.de/a/rechner-liefern-keine-korrekten-ergebnisse%2C1172144">Archived</a> from the original on 2016-05-30<span class="reference-accessdate">. Retrieved <span class="nowrap">2016-05-30</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Computerwoche&rft.atitle=Rechner+liefern+keine+korrekten+Ergebnisse+-+Neue+Arithmetik+der+Karlsruher+Forschungsgruppe+Kulisch+in+der+4361+realisiert&rft.date=1985-12-20&rft.au=CW&rft_id=http%3A%2F%2Fwww.computerwoche.de%2Fa%2Frechner-liefern-keine-korrekten-ergebnisse%2C1172144&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Further_reading">Further reading</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=IBM_4300&action=edit&section=15" title="Edit section: Further reading"><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="CITEREFPrasad1989" class="citation book cs1">Prasad, N. S. (1989). "Chapter 11". <span class="id-lock-registration" title="Free registration required"><a rel="nofollow" class="external text" href="https://archive.org/details/ibmmainframesarc00pras"><i>IBM Mainframes: Architecture and Design</i></a></span>. <a href="/wiki/McGraw-Hill" class="mw-redirect" title="McGraw-Hill">McGraw-Hill</a>. pp. <a rel="nofollow" class="external text" href="https://archive.org/details/ibmmainframesarc00pras/page/269">269</a>-274. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/007050686-8" title="Special:BookSources/007050686-8"><bdi>007050686-8</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.atitle=Chapter+11&rft.btitle=IBM+Mainframes%3A+Architecture+and+Design&rft.pages=269-274&rft.pub=McGraw-Hill&rft.date=1989&rft.isbn=007050686-8&rft.aulast=Prasad&rft.aufirst=N.+S.&rft_id=https%3A%2F%2Farchive.org%2Fdetails%2Fibmmainframesarc00pras&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIBM+4300" class="Z3988"></span> (NB. Describes the 4381.)</li></ul> <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=IBM_4300&action=edit&section=16" 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="https://web.archive.org/web/20050114203137/http://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_profiles.html">IBM Archives: Mainframes product profiles</a> at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> (archived 2005-01-14)</li> <li><a rel="nofollow" class="external text" href="https://livingcomputers.org/Computer-Collection/Online-Systems/Request-A-Login.aspx">Request a login</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200528215220/https://www.livingcomputers.org/Computer-Collection/Online-Systems/Request-A-Login.aspx">Archived</a> 2020-05-28 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> to <a href="/wiki/Living_Computers:_Museum_%2B_Labs" title="Living Computers: Museum + Labs">Living Computers: Museum + Labs</a> IBM 4361.</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 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class="new" title="IBM System/370 Model 125 (page does not exist)">Model 125</a></li> <li><a href="/wiki/IBM_System/370_Model_135" title="IBM System/370 Model 135">Model 135</a></li> <li><a href="/w/index.php?title=IBM_System/370_Model_138&action=edit&redlink=1" class="new" title="IBM System/370 Model 138 (page does not exist)">Model 138</a></li> <li><a href="/wiki/IBM_System/370_Model_145" title="IBM System/370 Model 145">Model 145</a></li> <li><a href="/wiki/IBM_System/370_Model_148" title="IBM System/370 Model 148">Model 148</a></li> <li><a href="/wiki/IBM_System/370_Model_155" title="IBM System/370 Model 155">Model 155</a></li> <li><a href="/w/index.php?title=IBM_System/370_Model_158&action=edit&redlink=1" class="new" title="IBM System/370 Model 158 (page does not exist)">Model 158</a></li> <li><a href="/wiki/IBM_System/370_Model_165" title="IBM System/370 Model 165">Model 165</a></li> <li><a href="/wiki/IBM_System/370_Model_168" title="IBM System/370 Model 168">Model 168</a></li> <li><a href="/wiki/IBM_System/370_Model_195" class="mw-redirect" title="IBM System/370 Model 195">Model 195</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/IBM_30XX_mainframe_lines" title="IBM 30XX mainframe lines">30XX</a><br />(1977–1990)</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/IBM_303X" title="IBM 303X">303X series</a></li> <li><a href="/wiki/IBM_308X" title="IBM 308X">308X series</a></li> <li><a href="/wiki/IBM_3090" title="IBM 3090">3090</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Low-end</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 class="mw-selflink selflink">43xx models</a></li> <li><a href="/wiki/IBM_9370" title="IBM 9370">9370 models</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Peripherals</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/IBM_270x" title="IBM 270x">270x communications controllers</a></li> <li><a href="/wiki/IBM_3705_Communications_Controller" title="IBM 3705 Communications Controller">3705 Communications Controller</a></li> <li><a href="/wiki/IBM_2540" title="IBM 2540">2540 punched-card reader–writer</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Software</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/DOS/360_and_successors" title="DOS/360 and successors">DOS/360 and successors</a></li> <li><a href="/wiki/OS/360_and_successors" title="OS/360 and successors">OS/360 and successors</a> <ul><li><a href="/wiki/OS/VS1" title="OS/VS1">OS/VS1</a></li></ul></li> <li><a href="/wiki/TSS_(operating_system)" title="TSS (operating system)">TSS/370</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</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/IBM_Basic_Assembly_Language_and_successors" class="mw-redirect" title="IBM Basic Assembly Language and successors">Basic Assembly Language and successors</a></li> <li><a href="/wiki/Bus_and_Tag" title="Bus and Tag">Bus and Tag</a></li> <li><a href="/wiki/Channel_I/O" title="Channel I/O">Channel I/O</a></li> <li><a href="/wiki/ES_EVM" title="ES EVM">ES EVM</a></li> <li><a href="/wiki/IBM_hexadecimal_floating-point" title="IBM hexadecimal floating-point">Hexadecimal floating-point</a></li> <li><a href="/wiki/Hercules_(emulator)" title="Hercules (emulator)">Hercules</a></li> <li><a href="/wiki/Language_for_Systems_Development" title="Language for Systems Development">Language for Systems Development</a></li> <li><a href="/wiki/PC-based_IBM_mainframe-compatible_systems" title="PC-based IBM mainframe-compatible systems">PC-based IBM mainframe-compatible systems</a></li> <li><a href="/wiki/Program_status_word" title="Program status word">Program status word</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><a href="/wiki/IBM_System/360" title="IBM System/360">System/360</a></li> <li><a href="/wiki/IBM_System/370" title="IBM System/370">System/370</a></li> <li><a href="/wiki/IBM_System/390" title="IBM System/390">IBM System/390</a></li> <li><a href="/wiki/IBM_Z#IBM_zSeries_family" title="IBM Z">IBM zSeries</a></li> <li><a href="/wiki/IBM_System_z9" title="IBM System z9">System z9</a></li> <li><a href="/wiki/IBM_System_z10" title="IBM System z10">System z10</a></li> <li><a href="/wiki/IBM_Z#IBM_zEnterprise_System" title="IBM Z">IBM zEnterprise System</a></li> <li><a href="/wiki/IBM_Z" title="IBM Z">IBM Z</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=IBM_4300&oldid=1245949294">https://en.wikipedia.org/w/index.php?title=IBM_4300&oldid=1245949294</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:IBM_System/360_mainframe_line" title="Category:IBM System/360 mainframe line">IBM System/360 mainframe line</a></li><li><a href="/wiki/Category:32-bit_computers" title="Category:32-bit computers">32-bit 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