List of IBM Personal Computer models explained

The IBM Personal Computer, commonly known as the IBM PC, spanned multiple models in its first generation (including the PCjr, the Portable PC, the XT, the AT, the Convertible, and the /370 systems, among others), from 1981 to 1987. It eventually gave way to many splintering product lines after IBM introduced the Personal System/2 in April 1987.

Notes

Legend

Models

Original line

+ IBM Personal Computer modelsTypeIBM Date announcedDate withdrawnBus of
slots		 of
bays		Processor Clock
speed
Stock onboard RAM
Maximum onboard RAM
NotesRef(s).
Personal Computer5150-001ISA, 8-bit52Intel 80884.7716 KB64 KBnonenoneDiskless model; only means of data storage is through IBM Cassette BASIC[1] [2] [3]
Personal Computer5150-003ISA, 8-bit52Intel 80884.7748 KB64 KB160 KBnoneSingle-sided, double-density floppy disk drive[4]
Personal Computer5150-013ISA, 8-bit52Intel 80884.77
Personal Computer5150-014ISA, 8-bit52Intel 80884.7716 KB64 KB160 KBnone[5] [6]
Personal Computer5150-064ISA, 8-bit52Intel 80884.7716 KB64 KB320 KBnone
Personal Computer5150-074ISA, 8-bit52Intel 80884.7716 KB64 KBtwo 320 KBnone
Personal Computer5150-X14ISA, 8-bit52Intel 80884.7716 KB64 KB160 KBnoneShipped without keyboard; includes adapter for integration with IBM 3278 terminal systems[7]
Personal Computer5150-X64ISA, 8-bit52Intel 80884.7716 KB64 KB320 KBnoneShipped without keyboard; includes adapter for integration with IBM 3278 terminal systems
Personal Computer5150-X74ISA, 8-bit52Intel 80884.7716 KB64 KBtwo 320 KBnoneShipped without keyboard; includes adapter for integration with IBM 3278 terminal systems
Personal Computer5150-114ISA, 8-bit52Intel 80884.7764 KB256 KB160 KBnone
Personal Computer5150-164ISA, 8-bit52Intel 80884.7764 KB256 KB320 KBnone
Personal Computer5150-174ISA, 8-bit52Intel 80884.7764 KB256 KBtwo 320 KBnone
Personal Computer5150-104ISA, 8-bit52Intel 80884.7764 KB256 KBnonenoneDiskless model; only means of data storage is through IBM Cassette BASIC[8] [9]
Personal Computer5150-166ISA, 8-bit52Intel 80884.77256 KB256 KB360 KBnone
Personal Computer5150-176ISA, 8-bit52Intel 80884.77256 KB256 KBtwo 360 KBnone[10] [11]
Personal Computer5150-X66ISA, 8-bit52Intel 80884.77256 KB256 KB360 KBnoneShipped without keyboard[12]
Personal Computer5150-X76ISA, 8-bit52Intel 80884.77256 KB256 KBtwo 360 KBnoneShipped without keyboard
Personal Computer XT5160-087ISA, 8-bit82Intel 80884.77128 KB640 KB360 KB10 MB[13]
Personal Computer XT5160-086ISA, 8-bit82Intel 80884.77256 KB640 KB360 KB10 MB[14]
Personal Computer XT5160-068ISA, 8-bit82Intel 80884.77256 KB640 KB360 KBnone[15]
Personal Computer XT5160-078ISA, 8-bit82Intel 80884.77256 KB640 KBtwo 360 KBnone
Personal Computer XT5160-088ISA, 8-bit82Intel 80884.77512 KB640 KB360 KB20 MBShipped with original IBM PC "Model F" keyboard[16]
Personal Computer XT5160-089ISA, 8-bit82Intel 80884.77512 KB640 KB360 KB20 MBShipped with Enhanced Keyboard
Personal Computer XT5160-267ISA, 8-bit82Intel 80884.77256 KB640 KB360 KBnoneShipped with original IBM PC "Model F" keyboard
Personal Computer XT5160-268ISA, 8-bit82Intel 80884.77256 KB640 KB360 KBnoneShipped with Enhanced Keyboard
Personal Computer XT5160-277ISA, 8-bit82Intel 80884.77256 KB640 KBtwo 360 KBnoneShipped with original IBM PC "Model F" keyboard
Personal Computer XT5160-278ISA, 8-bit82Intel 80884.77256 KB640 KBtwo 360 KBnoneShipped with Enhanced Keyboard
3270 PC5271-000ISA, 8-bit82Intel 80884.77256 KB640 KB360 KBnoneWithout printer adapter, fixed disk adapter, and keyboard[17] [18]
3270 PC5271-002ISA, 8-bit82Intel 80884.77256 KB640 KB360 KBnoneWithout printer adapter and fixed disk adapter[19]
3270 PC5271-004ISA, 8-bit82Intel 80884.77320 KB640 KB360 KBnoneWithout fixed disk adapter; stock onboard RAM increased to 384 KB in June 1984
3270 PC5271-006ISA, 8-bit82Intel 80884.77320 KB640 KB360 KB10 MBWith fixed disk adapter; stock onboard RAM increased to 384 KB in June 1984
Personal Computer XT/3705160-568ISA, 8-bit82Intel 80884.77256 KB640 KB360 KBnone[20]
Personal Computer XT/3705160-588ISA, 8-bit82Intel 80884.77256 KB640 KB360 KB10 MB
Personal Computer XT/3705160-589ISA, 8-bit82Intel 80884.77256 KB640 KB360 KB10 MB
PCjr4860-004CustomN/AN/AIntel 80884.7764 KB128 KBnonenone[21] [22]
PCjr4860-067CustomN/AN/AIntel 80884.77128 KB128 KB360 KBnone
Portable Personal Computer5155-068ISA, 8-bit82Intel 80884.77256 KB512 KB360 KBnone
Portable Personal Computer5155-076ISA, 8-bit82Intel 80884.77256 KB512 KBtwo 360 KBnone[23]
Personal Computer AT5170-068ISA, 16-bit83Intel 802866256 KB512 KB1.2 MBnone[24] [25]
Personal Computer AT5170-099ISA, 16-bit83Intel 802866512 KB512 KB1.2 MB20 MB
Personal Computer AT5170-239ISA, 16-bit83Intel 802866512 KB512 KB1.2 MB30 MB[26] [27]
Personal Computer AT5170-839ISA, 16-bit83Intel 802866512 KB512 KB1.2 MBtwo 30 MBIncludes controllers for the IBM 4680 Store System[28]
Personal Computer AT5170-899ISA, 16-bit83Intel 802866512 KB512 KB1.2 MBtwo 20 MBIncludes controllers for the IBM 4680 Store System
Personal Computer AT5170-319ISA, 16-bit83Intel 802868512 KB512 KB1.2 MB30 MB[29]
Personal Computer AT5170-339ISA, 16-bit83Intel 802868512 KB512 KB1.2 MB30 MBShipped with Enhanced Keyboard
Personal Computer AT5171-168ISA, 16-bit83Intel 802868512 KB512 KB1.2 MBnoneBuilt to TEMPEST specifications
Personal Computer AT5171-339ISA, 16-bit83Intel 802868512 KB512 KB1.2 MB30 MBBuilt to TEMPEST specifications
Personal Computer AT/3705170-599ISA, 16-bit83Intel 802866512 KB512 KB1.2 MB20 MB
Personal Computer AT/3705170-739ISA, 16-bit83Intel 802866512 KB512 KB1.2 MB30 MB[30] [31]
Personal Computer AT/3705170-919ISA, 16-bit83Intel 802866512 KB512 KB1.2 MB30 MB1 MB total RAM (peripheral)[32]
Personal Computer AT/3705170-939ISA, 16-bit83Intel 802866512 KB512 KB1.2 MB30 MB1 MB total RAM (peripheral); shipped with Enhanced Keyboard[33]
PC Convertible5140-002ISA, 8-bit (proprietary)N/AN/AIntel 80884.77256 KB512 KBtwo 720KnoneApplication bundle
PC Convertible5140-022ISA, 8-bit (proprietary)N/AN/AIntel 80884.77256 KB512 KBtwo 720Knone
Personal Computer XT Model 2865162-286ISA, 16-bit82Intel 802866640 KB640 KB1.2 MB20 MB[34]
Industrial Computer 55315531-001ISA, 8-bit83Intel 80884.77128 KB640 KB360 KB10 MBIndustrial version of the IBM PC XT[35] [36]
Industrial Computer 55315531-011ISA, 8-bit83Intel 80884.77256 KB640 KB1.2 MBnoneIndustrial version of the IBM PC XT[37]
Industrial Computer 55315531-021ISA, 8-bit83Intel 80884.77256 KB640 KB1.2 MB20 MBIndustrial version of the IBM PC XT
7531 Industrial Computer7531-041ISA, 16-bit83Intel 802866512 KB1 MBIndustrial version of the IBM PC AT, tower form-factor
7532 Industrial Computer7532-041ISA, 16-bit83Intel 802866512 KB1 MBIndustrial version of the IBM PC AT, 19-inch rack-mountable form factor
Industrial Computer 75527552-040ISA, 16-bit
MCA, 16-bit 		8 3 Intel 80286104 MBnonenoneAlso known as "Gearbox", rack-mountable ruggedized modular industrial computer, hybrid MCA and ISA with compromised ISA signal lines—notable for introducing the (16-bit) Micro Channel architecture half a year before the announcement of the PS/2 line in April 1987[38] [39] [40] [41]
Industrial Computer 75527552-140ISA, 16-bit
MCA, 16-bit 		8 3 Intel 80286104 MBone 1.44 MB 20 MB Also known as "Gearbox", rack-mountable ruggedized modular industrial computer, hybrid MCA and ISA with compromised ISA signal lines—notable for introducing the (16-bit) Micro Channel architecture half a year before the announcement of the PS/2 line in April 1987

Successor lines

See also

References

General references

Footnotes

Notes and References

  1. Hogan . Thom . September 14, 1981 . IBM Announces New Microcomputer System . InfoWorld . IDG Publications . 3 . 18 . 1, 14 . Google Books.
  2. Book: Mueller, Scott . 1994 . Upgrading and Repairing PCs . Que . 4th . 9781565299320 . the Internet Archive.
  3. Somerson . Paul . April 1983 . Revised Figures . PC Magazine . Ziff-Davis . 1 . 12 . 102 . Google Books.
  4. Ditela . Steve . December 14, 1981 . Wizard in Your Home . New York . 14 . 49 . 46–72 . Google Books.
  5. Book: November 1983 . Machine Preface . IBM Information Systems Group . MP 1.4 . the Internet Archive.
  6. Book: April 1985 . A Guide to IBM Personal Computers . International Business Machines Corporation . Ardent Tool.
  7. Book: November 1983 . Machine Preface . IBM Information Systems Group . MP 1.4 . the Internet Archive.
  8. 1984 . IBM PC 1, PC/XT & Portable PC Personal Computers . Microcomputer Systems . Data Decisions . 3 . 13 . the Internet Archive.
  9. Book: June 1984 . IBM Personal Computer Hardware Prices . IBM Product Center . obverse . the Vintage Technology Digital Archive.
  10. Staff writer . June 11, 1984 . IBM Slashes PC Prices, Adds Memory; Drops 64KB . Electronic News . Sage Publications . 30 . 1501 . 24 . Gale.
  11. Staff writer . June 12, 1984 . IBM Cuts Prices, Ups RAM . PC Week . Ziff-Davis . 1 . 23 . 1 . Gale . A company spokesman said the boost in memory [to 256 KB] was needed to accommodate the demand for more sophisticated applications, such a windowing. He added that although the 64K-byte systems will remain in production, the company eventually plans to phase them out..
  12. Book: April 6, 1987 . IBM Personal System/2 and IBM Personal Computer Product Reference . 4.0 . International Business Machines Corporation . Bitsavers.
  13. Sandler . Corey . April 1983 . IBM Drops the First Shoe . PC Magazine . Ziff-Davis . 1 . 12 . 90–102 . Google Books.
  14. Sanger . David E. . June 24, 1987 . I.B.M. Optimistic on Newest PC's . The New York Times . D4 . ProQuest.
  15. Sager . Ira . April 8, 1985 . IBM moves to reduce PC XT inventories . Electronic News . Sage Publications . 31 . 24 et seq. . Gale . The new floppy disk-based versions of the PC XT basically just strips the 10MB hard disk from the earlier unit. The machines come with base memory of 256KB and are available in either single or dual 360 KB diskette versions. A single diskette unit with keyboard and 256 KB of main memory is priced at $2,270, while the dual diskette version is priced at $2,570. A fully configured PC XT with 256 KB of RAM, a 360 KB diskette, keyboard, monochrome monitor and adapter, and operating system comes in at about $2,860..
  16. Whitmore . Sam . April 8, 1986 . Product blitz may signal more aggressive IBM: firm ups ante for the makers of compatibles . PC Week . Ziff-Davis . 3 . 14 . 1 . Gale.
  17. January 1984 . IBM 3770 Family Batch Communications Terminals . Distributed Processing & Intelligent Tennlnals . Datapro . C21-491-101 . Bitsavers.org.
  18. Libes . Sol . February 28, 1984 . 3270 emulation board makers, beware! IBM is aiming at you . PC Week . Ziff-Davis . 1 . 28 . 25 et seq. . Gale.
  19. Henkel . T. . October 24, 1983 . IBM Takes Wraps off Two Micros Capable of Accessing Mainframes . Computerworld . IDG Publications . 17 . 43 . 1, 10 . Google Books.
  20. April 13, 1987 . IBM Gives Up on the Personal XT/, AT/370 . Computer Business Review . New Statesman Media Group . https://archive.today/20230920021426/https://techmonitor.ai/technology/ibm_gives_up_on_the_personal_xt_at370 . September 20, 2023.
  21. 1984 . IBM PCjr . Microcomputer Systems . Data Decisions . 3 . 6 . the Internet Archive.
  22. Kicking Junior Out of the Family . https://web.archive.org/web/20090625185216/http://www.time.com/time/magazine/article/0%2C9171%2C964850%2C00.html . June 25, 2009 . February 23, 2011 . Castro . Janice . Bob Buderi . Thomas McCarroll . April 1, 1985 . Time . Time Inc. . dead .
  23. Staff writer . June 18, 1984 . IBM cuts micro prices . Computerworld . IDG Publications . XVIII . 25 . 8 . Google Books.
  24. Whitmore . Sam . August 14, 1984 . IBM's New Generation: The PC AT: AT Hikes CPU Speed Sixfold, Memory Fivefold . PC Week . Ziff-Davis . 1 . 32 . 1 . Gale . 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..
  25. Abruzzese . George . June 29, 1987 . IBM Plans to Terminate Remainder of PC Line . InfoWorld . IDG Publications . 9 . 26 . 1, 69 . Google Books.
  26. Kuzbyt . Bob . October 7, 1985 . IBM introduces 30-MB 5.25-inch Winchester disk drive for AT . Electronic News . Sage Publications . 31 . 26 . Gale.
  27. Ristelhueber . Robert . Ira Sager . September 8, 1986 . 4 PC suppliers add 286 units in battle with compatibles . Electronic News . Sage Publications . 32 . 1 et seq. . Gale.
  28. Whitmore . Sam . January 14, 1986 . IBM Debuts PC AT-Based Point-of-Sale Retail System . PC Week . Ziff-Davis . 3 . 2 . 8 . Gale.
  29. Whitmore . Sam . April 1, 1986 . IBM meetings said to key on new products . PC Week . Ziff-Davis . 3 . 13 . 1 . Gale.
  30. Sandker . C. . October 8, 1985 . IBM Delivers New PC AT Featuring 30M-Byte Disk: Sets a Price Tag of $5,995 . PC Week . Ziff-Davis . 2 . 40 . 1 . Gale.
  31. 1987 . Desktop Systems . PC Tech Journal . Ziff-Davis . 4 . 13 . 69 . the Internet Archive.
  32. Web site: Kennedy . Don . April 2, 1986 . IBM has boosted the processor speed and storage capacity of its personal computer models . PR Newswire . NYPR14C . Gale.
  33. Web site: Kennedy . Don . April 2, 1986 . IBM has boosted the processor speed and storage capacity of its personal computer models . PR Newswire . NYPR14C . Gale.
  34. Bridges . Linda . Laura Brennan . Jim Forbes . Bruce Stephen . July 7, 1987 . PC managers regrouping after XT, AT closeout . PC Week . Ziff-Davis . 4 . 27 . 4 . Gale . IBM's recent announcement that it will formally discontinue its PC XT line and eventually phase out its PC AT came as no surprise to many corporate users. [...] William Lowe, president of IBM's Entry Systems Division in Boca Raton, Fla., told Wall Street analysts on June 30 that the only remaining XT, the XT 286, will be discontinued within three months and that IBM is working with dealers and large accounts to determine how many more ATs it will make to fill orders..
  35. Web site: Staff writer . April 25, 1984 . Industrial-strength PC XT . UPI.com . United Press International . https://archive.today/20230920211216/https://www.upi.com/Archives/1984/04/25/Industrial-strength-PC-XT/2249451717200/ . September 20, 2023.
  36. Web site: May 21, 1985 . IBM Announcement Letter Number 185-053: IBM 7531 Industrial Computer . International Business Machines Corporation . https://web.archive.org/web/20070624110258/https://www.9999hp.net/7531/185-053.txt . June 24, 2007 . 9999hp.net.
  37. April 29, 1985 . IBM unveils entry-level 5531 model . Computerworld . IDG Publications . XIX . 17 . 48 . Google Books.
  38. Web site: IBM 7552 Industrial Computer Model 540 Announcement Letter. November 3, 1987. Industrial Business Machines. Ardent Tool. September 29, 2021.
  39. Book: Kono, M. E.. Surface Computer System Architecture for the Advanced Unmanned Search System (AUSS). Naval Command, Control and Ocean Surveillance Center. December 1992. Ardent Tool. 3.
  40. Wallace. Bob. IBM uncloaks industrial micro as network gateway. 3. 33. Google Books. Network World. October 20, 1986. IDG Publications.
  41. Cleaveland. Peter. April 21, 1987. 61. 5. 31. Instrumentation & Control Systems. Reed Business Information Enterprise. Low-cost, flexible microcomputers get jobs in factories. Gale OneFile. IBM doesn't advertise the PS/2 as a factory-floor machine, yet the PS/2's backplane bus structure, Micro Channel, appeared in a factory-floor computer before the PS/2 itself came on the market. People who examined the IBM 7552 Gearbox, ostensibly a factory-hardened version of the AT, notice something odd about the unit's bus: It had more bus lines than could be accounted for by the AT bus. The extra lines turned out to be the 16-bit Micro Channel. Nobody at IBM said anything about it at the time, because PS/2 hadn't yet been introduced..

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