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class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:CDC9762-smd-drive.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a8/CDC9762-smd-drive.jpg/220px-CDC9762-smd-drive.jpg" decoding="async" width="220" height="342" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a8/CDC9762-smd-drive.jpg/330px-CDC9762-smd-drive.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a8/CDC9762-smd-drive.jpg/440px-CDC9762-smd-drive.jpg 2x" data-file-width="850" data-file-height="1321" /></a><figcaption>CDC9762-smd-drive</figcaption></figure> <p><b>Storage Module Drive</b> (<b>SMD</b>) is a family of storage devices (<a href="/wiki/Hard_disk" class="mw-redirect" title="Hard disk">hard disk</a> drives) that were first shipped by <a href="/wiki/Control_Data_Corporation" title="Control Data Corporation">Control Data Corporation</a> in December 1973 as the CDC 9760 40 <a href="/wiki/Megabyte" title="Megabyte">MB</a> (unformatted) storage module disk drive.<sup id="cite_ref-Newsletter_1-0" class="reference"><a href="#cite_note-Newsletter-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> The CDC 9762 80 MB variant was announced in June 1974<sup id="cite_ref-Newsletter_1-1" class="reference"><a href="#cite_note-Newsletter-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> and the CDC 9764 150 MB and the CDC 9766 300 MB variants were announced in 1975<sup id="cite_ref-Newsletter_1-2" class="reference"><a href="#cite_note-Newsletter-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> (all capacities unformatted). A non-removable media variant family of 12, 24 and 48 MB capacity, the MMD, was then announced in 1976.<sup id="cite_ref-Newsletter_1-3" class="reference"><a href="#cite_note-Newsletter-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> This family's interface, <b>SMD</b>, derived from the earlier <a href="/wiki/Digital_Equipment_Corporation" title="Digital Equipment Corporation">Digital</a> RP0x interface, was documented as <a href="/wiki/ANSI" class="mw-redirect" title="ANSI">ANSI</a> Standard X3.91M - 1982, Storage Module Interfaces with Extensions for Enhanced Storage Module Interfaces. </p><p>The SMD interface is based upon a definition of two flat interface cables ("A" control and "B" data) which run from the disk drive to a <a href="/wiki/Hard_disk_drive_interface" title="Hard disk drive interface">hard disk drive interface</a> and then to a computer. This interface allows data to be transferred at 9.6 <a href="/wiki/Megabit" class="mw-redirect" title="Megabit">Mbit</a>/s. The SMD interface was supported by many 8 inch and 14 inch removable and non-removable disk drives. It was mainly implemented on disk drives used with <a href="/wiki/Mainframe_computer" title="Mainframe computer">mainframes</a> and <a href="/wiki/Minicomputer" title="Minicomputer">minicomputers</a> and was later itself replaced by <a href="/wiki/SCSI" title="SCSI">SCSI</a>. </p><p>Until the <a href="/wiki/Intelligent_Peripheral_Interface" title="Intelligent Peripheral Interface">Intelligent Peripheral Interface</a>, SMD was the standard hard disk interface for large-capacity and large-diameter drives. It was rarely used with microcomputers, except sometimes in large <a href="/wiki/File_server" title="File server">file servers</a>.<sup id="cite_ref-glass198902_2-0" class="reference"><a href="#cite_note-glass198902-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Control Data shipped its 100,000th SMD drive in July 1981.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> By 1983 at least 25 manufacturers had supplied SMD drives,<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> including, <a href="/wiki/Ampex" title="Ampex">Ampex</a>, <a href="/w/index.php?title=Century_Data_Systems&action=edit&redlink=1" class="new" title="Century Data Systems (page does not exist)">Century Data Systems</a>, <a href="/wiki/Control_Data_Corporation" title="Control Data Corporation">CDC</a>, <a href="/wiki/Fujitsu" title="Fujitsu">Fujitsu</a>, <a href="/wiki/Hitachi,_Ltd." class="mw-redirect" title="Hitachi, Ltd.">Hitachi</a>, <a href="/wiki/Micropolis_Corporation" title="Micropolis Corporation">Micropolis</a>, <a href="/wiki/Pertec" title="Pertec">Pertec</a>, <a href="/wiki/Priam_Systems" class="mw-redirect" title="Priam Systems">Priam</a>, <a href="/wiki/NEC" title="NEC">NEC</a> and <a href="/wiki/Toshiba" title="Toshiba">Toshiba</a>. </p> <div class="mw-heading mw-heading2"><h2 id="CDC_976x_disk_geometry">CDC 976x disk geometry</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Storage_Module_Device&action=edit&section=1" title="Edit section: CDC 976x disk geometry"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The CDC 9762 80 MB variant has 5 × 14" platters. The top and bottom platters are guard platters and not used for storage. The top and bottom guard platters are exactly the same size as the data platters, and are usually made from a data platter which had too many errors to be usable as a data platter. The remaining 3 platters give 5 data surfaces and one servo surface for head positioning, being the upper surface of the center platter. </p><p>The CDC 9766 300 MB variant has 12 × 14" platters. Again the top and bottom platters are guard platters and not used for storage. The remaining 10 platters give 19 data surfaces and one servo surface for head positioning, again being the upper surface of the center platter. </p><p>Common to both the 80 MB and 300 MB disks, they have 823 cylinders and the servo surface is on one of the central platters. The sector size and sectors per track depend on how the disk is initialized. For example on the <a href="/wiki/GEC_4000_series" title="GEC 4000 series">GEC 4000 series</a> minicomputers a configuration of 34 sectors of 512 data <a href="/wiki/Byte" title="Byte">bytes</a> each per track is used. </p><p>SMD <a href="/wiki/Disk_pack" title="Disk pack">disk packs</a> (as the Storage Module itself was most commonly called) required <a href="/wiki/Disk_pack#Alignment" title="Disk pack">head alignment</a> to assure interchangeability of media between drives. </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=Storage_Module_Device&action=edit&section=2" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-Newsletter-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-Newsletter_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Newsletter_1-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Newsletter_1-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-Newsletter_1-3"><sup><i><b>d</b></i></sup></a></span> <span class="reference-text">Control Data Corporation Newsletter, Summer 1977 Edition, p. 6</span> </li> <li id="cite_note-glass198902-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-glass198902_2-0">^</a></b></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 id="CITEREFGlass1989" class="citation magazine cs1">Glass, Brett (February 1989). <a rel="nofollow" class="external text" href="https://archive.org/details/eu_BYTE-1989-02_OCR/page/n350/mode/1up?view=theater">"Hard Disk Interfaces"</a>. <i>BYTE</i>. pp. 293–297<span class="reference-accessdate">. Retrieved <span class="nowrap">2024-10-08</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=BYTE&rft.atitle=Hard+Disk+Interfaces&rft.pages=293-297&rft.date=1989-02&rft.aulast=Glass&rft.aufirst=Brett&rft_id=https%3A%2F%2Farchive.org%2Fdetails%2Feu_BYTE-1989-02_OCR%2Fpage%2Fn350%2Fmode%2F1up%3Fview%3Dtheater&rfr_id=info%3Asid%2Fen.wikipedia.org%3AStorage+Module+Device" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text">Magnetic Peripherals Corp. Magazine, August 10, 1981</span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text">1984 Disk/Trend Report</span> </li> </ol></div> <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 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.navbox-title{background-color:#ddf}.mw-parser-output .navbox-subgroup .navbox-group,.mw-parser-output .navbox-subgroup .navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Technical_and_de_facto_standards_for_wired_computer_buses" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini 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this template">e</abbr></a></li></ul></div><div id="Technical_and_de_facto_standards_for_wired_computer_buses" style="font-size:114%;margin:0 4em"><a href="/wiki/Technical_standard" title="Technical standard">Technical</a> and <a href="/wiki/De_facto_standard" title="De facto standard"><i>de facto</i> standards</a> for <a href="/wiki/Wired_communication" title="Wired communication">wired</a> <a href="/wiki/Bus_(computing)" title="Bus (computing)">computer buses</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">General</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/System_bus" title="System bus">System bus</a></li> <li><a href="/wiki/Front-side_bus" title="Front-side bus">Front-side bus</a></li> <li><a href="/wiki/Back-side_bus" title="Back-side bus">Back-side bus</a></li> <li><a href="/wiki/Daisy_chain_(electrical_engineering)" title="Daisy chain (electrical engineering)">Daisy chain</a></li> <li><a href="/wiki/Control_bus" title="Control bus">Control bus</a></li> <li><a href="/wiki/Address_bus" class="mw-redirect" title="Address bus">Address bus</a></li> <li><a href="/wiki/Bus_contention" title="Bus contention">Bus contention</a></li> <li><a href="/wiki/Bus_mastering" title="Bus mastering">Bus mastering</a></li> <li><a href="/wiki/Network_on_a_chip" title="Network on a chip">Network on a chip</a></li> <li><a href="/wiki/Plug_and_play" title="Plug and play">Plug and play</a></li> <li><a href="/wiki/List_of_interface_bit_rates#Computer_buses" title="List of interface bit rates">List of bus bandwidths</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Standards</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/SS-50_bus" title="SS-50 bus">SS-50 bus</a></li> <li><a href="/wiki/S-100_bus" title="S-100 bus">S-100 bus</a></li> <li><a href="/wiki/Multibus" title="Multibus">Multibus</a></li> <li><a href="/wiki/Unibus" title="Unibus">Unibus</a></li> <li><a href="/wiki/VAXBI_bus" title="VAXBI bus">VAXBI</a></li> <li><a href="/wiki/MBus_(SPARC)" title="MBus (SPARC)">MBus</a></li> <li><a href="/wiki/STD_Bus" title="STD Bus">STD Bus</a></li> <li><a href="/wiki/System_Management_Bus" title="System Management Bus">SMBus</a></li> <li><a href="/wiki/Q-Bus" title="Q-Bus">Q-Bus</a></li> <li><a href="/wiki/Europe_Card_Bus" title="Europe Card Bus">Europe Card Bus</a></li> <li><a href="/wiki/Industry_Standard_Architecture" title="Industry Standard Architecture">ISA</a></li> <li><a href="/wiki/STEbus" title="STEbus">STEbus</a></li> <li><a href="/wiki/Amiga_Zorro_II" title="Amiga Zorro II">Zorro II</a></li> <li><a href="/wiki/Amiga_Zorro_III" title="Amiga Zorro III">Zorro III</a></li> <li><a href="/wiki/Computer_Automated_Measurement_and_Control" title="Computer Automated Measurement and Control">CAMAC</a></li> <li><a href="/wiki/FASTBUS" title="FASTBUS">FASTBUS</a></li> <li><a href="/wiki/Low_Pin_Count" title="Low Pin Count">LPC</a></li> <li><a href="/wiki/HP_Precision_Bus" title="HP Precision Bus">HP Precision Bus</a></li> <li><a href="/wiki/Extended_Industry_Standard_Architecture" title="Extended Industry Standard Architecture">EISA</a></li> <li><a href="/wiki/VMEbus" title="VMEbus">VME</a></li> <li><a href="/wiki/VME_eXtensions_for_Instrumentation" title="VME eXtensions for Instrumentation">VXI</a></li> <li><a href="/wiki/VXS" title="VXS">VXS</a></li> <li><a href="/wiki/VPX" title="VPX">VPX</a></li> <li><a href="/wiki/NuBus" title="NuBus">NuBus</a></li> <li><a href="/wiki/TURBOchannel" title="TURBOchannel">TURBOchannel</a></li> <li><a href="/wiki/Micro_Channel_architecture" title="Micro Channel architecture">MCA</a></li> <li><a href="/wiki/SBus" title="SBus">SBus</a></li> <li><a href="/wiki/VESA_Local_Bus" title="VESA Local Bus">VLB</a></li> <li><a href="/wiki/GSC_bus" title="GSC bus">HP GSC bus</a></li> <li><a href="/wiki/InfiniBand" title="InfiniBand">InfiniBand</a></li> <li><a href="/wiki/Ethernet" title="Ethernet">Ethernet</a></li> <li><a href="/wiki/Ultra_Port_Architecture" title="Ultra Port Architecture">UPA</a></li> <li><a href="/wiki/Peripheral_Component_Interconnect" title="Peripheral Component Interconnect">PCI</a></li> <li><a href="/wiki/PCI-X" title="PCI-X">PCI Extended (PCI-X)</a></li> <li><a href="/wiki/PCI_eXtensions_for_Instrumentation" title="PCI eXtensions for Instrumentation">PXI</a></li> <li><a href="/wiki/PCI_Express" title="PCI Express">PCI Express (PCIe)</a></li> <li><a href="/wiki/Accelerated_Graphics_Port" title="Accelerated Graphics Port">AGP</a></li> <li><a href="/wiki/Compute_Express_Link" title="Compute Express Link">Compute Express Link (CXL)</a></li> <li><a href="/wiki/Direct_Media_Interface" title="Direct Media Interface">Direct Media Interface (DMI)</a></li> <li><a href="/wiki/RapidIO" title="RapidIO">RapidIO</a></li> <li><a href="/wiki/Intel_QuickPath_Interconnect" title="Intel QuickPath Interconnect">Intel QuickPath Interconnect</a></li> <li><a href="/wiki/NVLink" title="NVLink">NVLink</a></li> <li><a href="/wiki/HyperTransport" title="HyperTransport">HyperTransport</a> <ul><li><a href="/wiki/Infinity_Fabric" class="mw-redirect" title="Infinity Fabric">Infinity Fabric</a></li></ul></li> <li><a href="/wiki/Intel_Ultra_Path_Interconnect" title="Intel Ultra Path Interconnect">Intel Ultra Path Interconnect</a></li> <li><a href="/wiki/Coherent_Accelerator_Processor_Interface" title="Coherent Accelerator Processor Interface">Coherent Accelerator Processor Interface (CAPI)</a></li> <li><a href="/wiki/SpaceWire" title="SpaceWire">SpaceWire</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Storage</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/ST-506/ST-412" title="ST-506/ST-412">ST-506</a></li> <li><a href="/wiki/Enhanced_Small_Disk_Interface" title="Enhanced Small Disk Interface">ESDI</a></li> <li><a href="/wiki/Intelligent_Peripheral_Interface" title="Intelligent Peripheral Interface">IPI</a></li> <li><a class="mw-selflink selflink">SMD</a></li> <li><a href="/wiki/Parallel_ATA" title="Parallel ATA">Parallel ATA (PATA)</a></li> <li><a href="/wiki/Bus_and_Tag" title="Bus and Tag">Bus and Tag</a></li> <li><a href="/wiki/Digital_Storage_Systems_Interconnect" title="Digital Storage Systems Interconnect">DSSI</a></li> <li><a href="/wiki/HIPPI" title="HIPPI">HIPPI</a></li> <li><a href="/wiki/SATA" title="SATA">Serial ATA (SATA)</a></li> <li><a href="/wiki/SCSI" title="SCSI">SCSI</a> <ul><li><a href="/wiki/Parallel_SCSI" title="Parallel SCSI">Parallel</a></li> <li><a href="/wiki/Serial_Attached_SCSI" title="Serial Attached SCSI">SAS</a></li></ul></li> <li><a href="/wiki/ESCON" title="ESCON">ESCON</a></li> <li><a href="/wiki/Fibre_Channel" title="Fibre Channel">Fibre Channel</a></li> <li><a href="/wiki/Serial_Storage_Architecture" title="Serial Storage Architecture">SSA</a></li> <li><a href="/wiki/SATA_Express" title="SATA Express">SATAe</a></li> <li>PCI Express (via <a href="/wiki/Advanced_Host_Controller_Interface" title="Advanced Host Controller Interface">AHCI</a> or <a href="/wiki/NVM_Express" title="NVM Express">NVMe</a> logical device interface)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Peripheral</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apple_Desktop_Bus" title="Apple Desktop Bus">Apple Desktop Bus</a></li> <li><a href="/wiki/Atari_SIO" title="Atari SIO">Atari SIO</a></li> <li><a href="/wiki/Digital_Control_Bus" title="Digital Control Bus">DCB</a></li> <li><a href="/wiki/Commodore_bus" title="Commodore bus">Commodore bus</a></li> <li><a href="/wiki/HP-IL" title="HP-IL">HP-IL</a></li> <li><a href="/wiki/HIL_bus" title="HIL bus">HIL</a></li> <li><a href="/wiki/MIDI" title="MIDI">MIDI</a></li> <li><a href="/wiki/RS-232" title="RS-232">RS-232</a></li> <li><a href="/wiki/RS-422" title="RS-422">RS-422</a></li> <li><a href="/wiki/RS-423" title="RS-423">RS-423</a></li> <li><a href="/wiki/RS-485" title="RS-485">RS-485</a></li> <li><a href="/wiki/Lightning_(connector)" title="Lightning (connector)">Lightning</a></li> <li><a href="/wiki/DMX512#DMX512-A" title="DMX512">DMX512-A</a></li> <li><a href="/wiki/IEEE-488" class="mw-redirect" title="IEEE-488">IEEE-488 (GPIB)</a></li> <li><a href="/wiki/IEEE_1284" title="IEEE 1284">IEEE-1284 (parallel port)</a></li> <li><a href="/wiki/IEEE_1394" title="IEEE 1394">IEEE-1394 (FireWire)</a></li> <li><a href="/wiki/UNI/O" title="UNI/O">UNI/O</a></li> <li><a href="/wiki/1-Wire" title="1-Wire">1-Wire</a></li> <li><a href="/wiki/I%C2%B2C" title="I²C">I²C</a> (<a href="/wiki/ACCESS.bus" title="ACCESS.bus">ACCESS.bus</a>, <a href="/wiki/Power_Management_Bus" title="Power Management Bus">PMBus</a>, <a href="/wiki/System_Management_Bus" title="System Management Bus">SMBus</a>)</li> <li><a href="/wiki/I3C_(bus)" title="I3C (bus)">I3C</a></li> <li><a href="/wiki/Serial_Peripheral_Interface" title="Serial Peripheral Interface">SPI</a></li> <li><a href="/wiki/IEC_61030" title="IEC 61030">D²B</a></li> <li><a href="/wiki/Parallel_SCSI" title="Parallel SCSI">Parallel SCSI</a></li> <li><a href="/wiki/Profibus" title="Profibus">Profibus</a></li> <li><a href="/wiki/USB" title="USB">USB</a></li> <li><a href="/wiki/Camera_Link" title="Camera Link">Camera Link</a></li> <li><a href="/wiki/PCI_Express#PCI_Express_External_Cabling" title="PCI Express">External PCIe</a></li> <li><a href="/wiki/Thunderbolt_(interface)" title="Thunderbolt (interface)">Thunderbolt</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Audio</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/ADAT_Lightpipe" title="ADAT Lightpipe">ADAT Lightpipe</a></li> <li><a href="/wiki/AES3" title="AES3">AES3</a></li> <li><a href="/wiki/Intel_High_Definition_Audio" title="Intel High Definition Audio">Intel HD Audio</a></li> <li><a href="/wiki/I%C2%B2S" title="I²S">I²S</a></li> <li><a href="/wiki/MADI" title="MADI">MADI</a></li> <li><a href="/wiki/McASP" title="McASP">McASP</a></li> <li><a href="/wiki/S/PDIF" title="S/PDIF">S/PDIF</a></li> <li><a href="/wiki/TOSLINK" title="TOSLINK">TOSLINK</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Portable</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/PC_Card" title="PC Card">PC Card</a></li> <li><a href="/wiki/ExpressCard" title="ExpressCard">ExpressCard</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Embedded</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Multidrop_bus" title="Multidrop bus">Multidrop bus</a></li> <li><a href="/wiki/CoreConnect" title="CoreConnect">CoreConnect</a></li> <li><a href="/wiki/Advanced_Microcontroller_Bus_Architecture" title="Advanced Microcontroller Bus Architecture">AMBA</a> (<a href="/wiki/Advanced_eXtensible_Interface" title="Advanced eXtensible Interface">AXI</a>)</li> <li><a href="/wiki/Wishbone_(computer_bus)" title="Wishbone (computer bus)">Wishbone</a></li> <li><a href="/wiki/SLIMbus" title="SLIMbus">SLIMbus</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div><small>Interfaces are listed by their speed in the (roughly) ascending order, so the interface at the end of each section should be the fastest.</small><br /><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:Computer_buses" title="Category:Computer buses">Category</a></div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Control_Data_Corporation" style="padding:3px"><table class="nowraplinks hlist mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="3"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Control_Data_Corporation" title="Template:Control Data Corporation"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/w/index.php?title=Template_talk:Control_Data_Corporation&action=edit&redlink=1" class="new" title="Template talk:Control Data Corporation (page does not exist)"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Control_Data_Corporation" title="Special:EditPage/Template:Control Data Corporation"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Control_Data_Corporation" style="font-size:114%;margin:0 4em"><a href="/wiki/Control_Data_Corporation" title="Control Data Corporation">Control Data 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-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/William_Norris_(CEO)" title="William Norris (CEO)">William Norris</a></li> <li><a href="/wiki/Seymour_Cray" title="Seymour Cray">Seymour Cray</a></li></ul> </div></td><td class="noviewer navbox-image" rowspan="5" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"><a href="/wiki/File:CDC-Logo.svg" class="mw-file-description" title="CDC logo"><img alt="CDC logo" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/35/CDC-Logo.svg/150px-CDC-Logo.svg.png" decoding="async" width="150" height="114" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/35/CDC-Logo.svg/225px-CDC-Logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/35/CDC-Logo.svg/300px-CDC-Logo.svg.png 2x" data-file-width="512" data-file-height="389" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Computers</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/CDC_1604" title="CDC 1604">CDC 1604</a></li> <li><a href="/wiki/CDC_160_series" title="CDC 160 series">CDC 160 series</a></li> <li><a href="/wiki/CDC_1700" title="CDC 1700">CDC 1700</a></li> <li><a href="/wiki/CDC_3000_series" title="CDC 3000 series">CDC 3000 series</a></li> <li><a href="/wiki/CDC_6000_series" title="CDC 6000 series">CDC 6000 series</a> <ul><li><a href="/wiki/CDC_6600" title="CDC 6600">CDC 6600</a></li></ul></li> <li><a href="/wiki/CDC_7600" title="CDC 7600">CDC 7600</a></li> <li><a href="/wiki/CDC_8600" title="CDC 8600">CDC 8600</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Vector" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Vector_processor" title="Vector processor">Vector</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/CDC_STAR-100" title="CDC STAR-100">CDC STAR-100</a></li> <li><a href="/wiki/CDC_Cyber_200" class="mw-redirect" title="CDC Cyber 200">CDC Cyber 200</a></li></ul> </div></td></tr></tbody></table><div> <ul><li><a href="/wiki/CDC_Cyber" title="CDC Cyber">CDC Cyber</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-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/O26_(text_editor)" title="O26 (text editor)">026</a></li></ul> <ul><li>Languages: <ul><li><a href="/wiki/COMPASS" title="COMPASS">COMPASS</a></li> <li><a href="/wiki/SYMPL" title="SYMPL">SYMPL</a></li> <li><a href="/wiki/Cybil_(programming_language)" title="Cybil (programming language)">Cybil</a></li> <li><a href="/wiki/MIMIC" title="MIMIC">MIMIC</a></li></ul></li></ul> <ul><li>OS: <ul><li><a href="/wiki/Chippewa_Operating_System" title="Chippewa Operating System">Chippewa Operating System</a></li> <li><a href="/wiki/CDC_Kronos" title="CDC Kronos">CDC Kronos</a></li> <li><a href="/wiki/NOS_(operating_system)" title="NOS (operating system)">NOS</a> <ul><li><a href="/wiki/NOS/VE" title="NOS/VE">NOS/VE</a></li></ul></li> <li><a href="/wiki/CDC_SCOPE" title="CDC SCOPE">CDC SCOPE</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other products</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/CDC_Wren" title="CDC Wren">CDC Wren</a></li> <li><a class="mw-selflink selflink">Storage Module Device</a></li> <li><a href="/wiki/PLATO_(computer_system)" title="PLATO (computer system)">PLATO (computer system)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Affiliated companies<br />and products</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/ETA_Systems" title="ETA Systems">ETA Systems</a> <ul><li><a href="/wiki/ETA10" title="ETA10">ETA10</a></li></ul></li></ul> <ul><li><a href="/wiki/Cray_Inc." class="mw-redirect" title="Cray Inc.">Cray Inc.</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" 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