Editing IBM Personal Computer AT (section)

=== Models ===
{{Main|List of IBM Personal Computer models}}
{| class="wikitable sortable sticky-header sort-under" 
|- 
|+ IBM Personal Computer models
! Type
! IBM {{abbr|P/N|part number}}
! Date announced
! Date withdrawn
! Bus
! {{abbr|No.|Number}} of<br />slots
! {{abbr|No.|Number}} of<br />bays
! Processor          
! Clock<br />speed<br />{{small|(MHz)}}
! Stock onboard RAM<br />{{small|(KB)}}
! Maximum onboard RAM<br />{{small|(KB)}}
! {{abbr|FDD|Floppy disk drive}}
! {{abbr|HDD|Hard disk drive}}
! Notes
! Ref(s).
|-
| AT
| 5170-068
| {{date table sorting|1984|08|14|format=my}}
| {{date table sorting|1987|06|30|format=my}}
| [[Industry Standard Architecture|ISA]], 16-bit
| 8
| 3
| [[Intel 80286]]
| 6
| 256&nbsp;KB
| 512&nbsp;KB
| 1.2&nbsp;MB
| none
|  
| <ref name=ibmref40>{{cite book | date=April 6, 1987 | url=https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 | title=IBM Personal System/2 and IBM Personal Computer Product Reference | edition=4.0 | publisher=International Business Machines Corporation | via=[[Bitsavers]]}}</ref>{{rp|49}}<ref name=pcweekatannounced>{{cite journal | last=Whitmore | first=Sam | date=August 14, 1984 | url=https://link.gale.com/apps/doc/A573108/GPS?sid=wikipedia | title=IBM's New Generation: The PC AT: AT Hikes CPU Speed Sixfold, Memory Fivefold | journal=PC Week | publisher=Ziff-Davis | volume=1 | issue=32 | page=1 | via=Gale | quote=The IBM PC AT Base Model 68, with one 1.2-megabyte floppy-disk drive, will sell for $3,995, according to a source close to IBM. Model 99, with a 1.2-megabyte floppy-disk drive and a 20-megabyte hard disk, will cost $5,795. Both models will use a 6-MHz 80286 microprocessor.}}</ref><ref name=atdiscontinued>{{cite journal | last=Abruzzese | first=George | date=June 29, 1987 | url=https://books.google.com/books?id=xjAEAAAAMBAJ&pg=PA1 | title=IBM Plans to Terminate Remainder of PC Line | journal=InfoWorld | publisher=IDG Publications | volume=9 | issue=26 | pages=1, 69 | via=Google Books}}</ref>
|-
| AT
| 5170-099
| {{date table sorting|1984|08|14|format=my}}
| {{date table sorting|1987|06|30|format=my}}
| [[Industry Standard Architecture|ISA]], 16-bit
| 8
| 3
| [[Intel 80286]]
| 6
| 512&nbsp;KB
| 512&nbsp;KB
| 1.2&nbsp;MB
| 20&nbsp;MB
|  
| <ref name=ibmref40 />{{rp|236}}<ref name=pcweekatannounced /><ref name=atdiscontinued />
|-
| AT
| 5170-239
| {{date table sorting|1985|10|01|format=my}}
| {{date table sorting|1986|09|02|format=my}}
| [[Industry Standard Architecture|ISA]], 16-bit
| 8
| 3
| [[Intel 80286]]
| 6
| 512&nbsp;KB
| 512&nbsp;KB
| 1.2&nbsp;MB
| 30&nbsp;MB
|  
| <ref name=ibmref40 />{{rp|236}}<ref name=at30mb>{{cite journal | last=Kuzbyt | first=Bob | date=October 7, 1985 | url=https://link.gale.com/apps/doc/A3972202/GPS?sid=wikipedia | title=IBM introduces 30-MB 5.25-inch Winchester disk drive for AT | journal=Electronic News | publisher= Sage Publications | volume=31 | page=26 | via=Gale}}</ref><ref name=Ristelhueber>{{cite journal | last=Ristelhueber | first=Robert | author2=Ira Sager | date=September 8, 1986 | url=https://link.gale.com/apps/doc/A4398861/GPS?sid=wikipedia | title=4 PC suppliers add 286 units in battle with compatibles | journal=Electronic News | publisher=Sage Publications | volume=32 | pages=1 ''et seq'' | via=Gale}}</ref>
|-
| AT
| 5170-839
| {{date table sorting|1986|01|08|format=my}}
| {{date table sorting|1987|06|30|format=my}}
| [[Industry Standard Architecture|ISA]], 16-bit
| 8
| 3
| [[Intel 80286]]
| 6
| 512&nbsp;KB
| 512&nbsp;KB
| 1.2&nbsp;MB
| two&nbsp;30&nbsp;MB
| Includes controllers for the [[IBM 4680|IBM 4680 Store System]]
| <ref name=ibmref40 />{{rp|236}}<ref name=at4680>{{cite journal | last=Whitmore | first=Sam | date=January 14, 1986 | url=https://link.gale.com/apps/doc/A656864/GPS?sid=wikipedia | title=IBM Debuts PC AT-Based Point-of-Sale Retail System | journal=PC Week | publisher=Ziff-Davis | volume=3 | issue=2 | page=8 | via=Gale}}</ref><ref name=atdiscontinued />
|-
| AT
| 5170-899
| {{date table sorting|1986|01|08|format=my}}
| {{date table sorting|1987|06|30|format=my}}
| [[Industry Standard Architecture|ISA]], 16-bit
| 8
| 3
| [[Intel 80286]]
| 6
| 512&nbsp;KB
| 512&nbsp;KB
| 1.2&nbsp;MB
| two&nbsp;20&nbsp;MB
| Includes controllers for the [[IBM 4680|IBM 4680 Store System]]
| <ref name=ibmref40 />{{rp|236}}<ref name=at4680 /><ref name=atdiscontinued />
|-
| AT
| 5170-319
| {{date table sorting|1986|04|02|format=my}}
| {{date table sorting|1987|06|30|format=my}}
| [[Industry Standard Architecture|ISA]], 16-bit
| 8
| 3
| [[Intel 80286]]
| 8
| 512&nbsp;KB
| 512&nbsp;KB
| 1.2&nbsp;MB
| 30&nbsp;MB
|  
| <ref name=ibmref40 />{{rp|236}}<ref name=at8mhz>{{cite journal | last=Whitmore | first=Sam | date=April 1, 1986 | url=https://link.gale.com/apps/doc/A666974/GPS?sid=wikipedia | title=IBM meetings said to key on new products | journal=PC Week | publisher=Ziff-Davis | volume=3 | issue=13 | page=1 | via=Gale}}</ref><ref name=atdiscontinued />
|-
| AT
| 5170-339
| {{date table sorting|1986|04|02|format=my}}
| {{date table sorting|1987|07|format=my}}
| [[Industry Standard Architecture|ISA]], 16-bit
| 8
| 3
| [[Intel 80286]]
| 8
| 512&nbsp;KB
| 512&nbsp;KB
| 1.2&nbsp;MB
| 30&nbsp;MB
| Shipped with Enhanced Keyboard
| <ref name=ibmref40 />{{rp|236}}<ref name=at8mhz /><ref name=atdiscontinued />
|-
| AT
| 5171-168
| {{date table sorting|1986|10|21|format=my}}
| {{date table sorting|1987|06|30|format=my}}
| [[Industry Standard Architecture|ISA]], 16-bit
| 8
| 3
| [[Intel 80286]]
| 8
| 512&nbsp;KB
| 512&nbsp;KB
| 1.2&nbsp;MB
| none
| Built to [[Tempest (codename)|TEMPEST]] specifications
| <ref name=ibmref40 />{{rp|64}}<ref name=atdiscontinued />
|-
| AT
| 5171-339
| {{date table sorting|1986|10|21|format=my}}
| {{date table sorting|1987|07|format=my}}
| [[Industry Standard Architecture|ISA]], 16-bit
| 8
| 3
| [[Intel 80286]]
| 8
| 512&nbsp;KB
| 512&nbsp;KB
| 1.2&nbsp;MB
| 30&nbsp;MB
| Built to [[Tempest (codename)|TEMPEST]] specifications
| <ref name=ibmref40 />{{rp|64}}<ref name=atdiscontinued />
|-
| [[IBM Personal Computer AT/370|AT/370]]
| 5170-599
| {{date table sorting|1984|10|25|format=my}}
| {{date table sorting|1987|04|02|format=my}}
| [[Industry Standard Architecture|ISA]], 16-bit
| 8
| 3
| [[Intel 80286]]
| 6
| 512&nbsp;KB
| 512&nbsp;KB
| 1.2&nbsp;MB
| 20&nbsp;MB
| 
| <ref name=ibmref40 />{{rp|202}}<ref name=givesup>{{cite journal | date=April 13, 1987 | url=https://techmonitor.ai/technology/ibm_gives_up_on_the_personal_xt_at370 | title=IBM Gives Up on the Personal XT/, AT/370 | journal=Computer Business Review | publisher=New Statesman Media Group | archiveurl=https://archive.today/20230920021426/https://techmonitor.ai/technology/ibm_gives_up_on_the_personal_xt_at370 | archivedate=September 20, 2023}}</ref>
|-
| [[IBM Personal Computer AT/370|AT/370]]
| 5170-739
| {{date table sorting|1985|10|01|format=my}}
| {{date table sorting|1987|04|02|format=my}}
| [[Industry Standard Architecture|ISA]], 16-bit
| 8
| 3
| [[Intel 80286]]
| 6
| 512&nbsp;KB
| 512&nbsp;KB
| 1.2&nbsp;MB
| 30&nbsp;MB
|  
| <ref name=ibmref40 />{{rp|202}}<ref name=sandker>{{cite journal | last=Sandker | first=C. | date=October 8, 1985 | url=https://link.gale.com/apps/doc/A649986/GPS?sid=wikipedia | title=IBM Delivers New PC AT Featuring 30M-Byte Disk: Sets a Price Tag of $5,995 | journal=PC Week | publisher=Ziff-Davis | volume=2 | issue=40 | page=1 | via=Gale}}</ref><ref name=pctjv4n13>{{cite journal | date=1987 | url=https://archive.org/details/PC_Tech_Journal_vol04_n13/page/69/ | title=Desktop Systems | journal=PC Tech Journal | publisher=Ziff-Davis | volume=4 | issue=13 | page=69 | via=the Internet Archive}}</ref><ref name=givesup />
|-
| [[IBM Personal Computer AT/370|AT/370]]
| 5170-919
| {{date table sorting|1986|04|02|format=my}}
| {{date table sorting|1987|04|02|format=my}}
| [[Industry Standard Architecture|ISA]], 16-bit
| 8
| 3
| [[Intel 80286]]
| 6
| 512&nbsp;KB
| 512&nbsp;KB
| 1.2&nbsp;MB
| 30&nbsp;MB
| 1&nbsp;MB total RAM (peripheral)
| <ref name=ibmref40 />{{rp|57}}<ref name=prnewswireat370>{{cite web | last=Kennedy | first=Don | date=April 2, 1986 | url=https://link.gale.com/apps/doc/A4196480/GPS?sid=wikipedia | title=IBM has boosted the processor speed and storage capacity of its personal computer models | publisher=PR Newswire | page=NYPR14C | via=Gale}}</ref><ref name=givesup />
|-
| [[IBM Personal Computer AT/370|AT/370]]
| 5170-939
| {{date table sorting|1986|04|02|format=my}}
| {{date table sorting|1987|04|02|format=my}}
| [[Industry Standard Architecture|ISA]], 16-bit
| 8
| 3
| [[Intel 80286]]
| 6
| 512&nbsp;KB
| 512&nbsp;KB
| 1.2&nbsp;MB
| 30&nbsp;MB
| 1&nbsp;MB total RAM (peripheral); shipped with Enhanced Keyboard
| <ref name=ibmref40 />{{rp|57}}<ref name=prnewswireat370/><ref name=givesup />
|}