Menu
Home Explore People Places Arts History Plants & Animals Science Life & Culture Technology
On this page
List of IBM Personal Computer models

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   ISA, 8-bit   ISA, 16-bit   Other

Models

Original line

IBM Personal Computer models
TypeIBM P/NDate announcedDate withdrawnBusNo. ofslotsNo. ofbaysProcessorClockspeed(MHz)Stock onboard RAM(KB)Maximum onboard RAM(KB)FDDHDDNotesRef(s).
Personal Computer5150-001August 1981March 1983ISA, 8-bit52Intel 80884.7716 KB64 KBnonenoneDiskless model; only means of data storage is through IBM Cassette BASIC1: 1 2: 167, 1050 3
Personal Computer5150-003August 1981March 1983ISA, 8-bit52Intel 80884.7748 KB64 KB160 KBnoneSingle-sided, double-density floppy disk drive4: 1 5: 47 6: 167, 1050 7
Personal Computer5150-013Un­knownUn­knownISA, 8-bit52Intel 80884.77Un­knownUn­knownUn­knownUn­known 8: 228 
Personal Computer5150-014Un­knownMarch 1983ISA, 8-bit52Intel 80884.7764 KB64 KB160 KBnone91011: 11-15 
Personal Computer5150-064Un­knownMarch 1983ISA, 8-bit52Intel 80884.7764 KB64 KB320 KBnone1213: 11-15 
Personal Computer5150-074Un­knownMarch 1983ISA, 8-bit52Intel 80884.7764 KB64 KBtwo 320 KBnone1415: 11-15 
Personal Computer5150-X14Un­knownMarch 1983ISA, 8-bit52Intel 80884.7764 KB64 KB160 KBnoneShipped without keyboard; includes adapter for integration with IBM 3278 terminal systems161718: 11-15 
Personal Computer5150-X64Un­knownMarch 1983ISA, 8-bit52Intel 80884.7764 KB64 KB320 KBnoneShipped without keyboard; includes adapter for integration with IBM 3278 terminal systems192021: 11-15 
Personal Computer5150-X74Un­knownMarch 1983ISA, 8-bit52Intel 80884.7764 KB64 KBtwo 320 KBnoneShipped without keyboard; includes adapter for integration with IBM 3278 terminal systems222324: 11-15 
Personal Computer5150-114Un­knownJune 1984ISA, 8-bit52Intel 80884.7764 KB256 KB160 KBnone 25: 228 262728
Personal Computer5150-164Un­knownJune 1984ISA, 8-bit52Intel 80884.7764 KB256 KB320 KBnone 29: 228 303132
Personal Computer5150-174Un­knownJune 1984ISA, 8-bit52Intel 80884.7764 KB256 KBtwo 320 KBnone 33: 236 3435
Personal Computer5150-104June 1984April 1987ISA, 8-bit52Intel 80884.7764 KB256 KBnonenoneDiskless model; only means of data storage is through IBM Cassette BASIC36: 228 373839: 11-10 40
Personal Computer5150-166June 1984April 1987ISA, 8-bit52Intel 80884.77256 KB256 KB360 KBnone41: 236 4243
Personal Computer5150-176June 1984April 1987ISA, 8-bit52Intel 80884.77256 KB256 KBtwo 360 KBnone 44: 236 4546
Personal Computer5150-X66June 1984December 1985ISA, 8-bit52Intel 80884.77256 KB256 KB360 KBnoneShipped without keyboard47: 236 
Personal Computer5150-X76June 1984December 1985ISA, 8-bit52Intel 80884.77256 KB256 KBtwo 360 KBnoneShipped without keyboard48: 236 
Personal Computer XT5160-087March 1983June 1984ISA, 8-bit82Intel 80884.77128 KB640 KB360 KB10 MB 49: 236 5051: 1068 
Personal Computer XT5160-086June 1984June 1987ISA, 8-bit82Intel 80884.77256 KB640 KB360 KB10 MB 52: 236 535455
Personal Computer XT5160-068April 1985June 1987ISA, 8-bit82Intel 80884.77256 KB640 KB360 KBnone 56: 236 57: 1068 585960
Personal Computer XT5160-078April 1985June 1987ISA, 8-bit82Intel 80884.77256 KB640 KBtwo 360 KBnone 61: 236 62: 1068 636465
Personal Computer XT5160-088April 1986June 1987ISA, 8-bit82Intel 80884.77512 KB640 KB360 KB20 MBShipped with original IBM PC "Model F" keyboard66: 236 676869
Personal Computer XT5160-089April 1986June 1987ISA, 8-bit82Intel 80884.77512 KB640 KB360 KB20 MBShipped with Enhanced Keyboard70: 236 717273
Personal Computer XT5160-267April 1986June 1987ISA, 8-bit82Intel 80884.77256 KB640 KB360 KBnoneShipped with original IBM PC "Model F" keyboard74: 236 757677
Personal Computer XT5160-268April 1986June 1987ISA, 8-bit82Intel 80884.77256 KB640 KB360 KBnoneShipped with Enhanced Keyboard78: 236 79
Personal Computer XT5160-277April 1986June 1987ISA, 8-bit82Intel 80884.77256 KB640 KBtwo 360 KBnoneShipped with original IBM PC "Model F" keyboard80
Personal Computer XT5160-278April 1986June 1987ISA, 8-bit82Intel 80884.77256 KB640 KBtwo 360 KBnoneShipped with Enhanced Keyboard81: 236 82
3270 PC5271-000Un­knownJuly 1987ISA, 8-bit82Intel 80884.77256 KB640 KB360 KBnoneWithout printer adapter, fixed disk adapter, and keyboard8384
3270 PC5271-002October 1983July 1987ISA, 8-bit82Intel 80884.77256 KB640 KB360 KBnoneWithout printer adapter and fixed disk adapter85: 49 8687: 10 88
3270 PC5271-004October 1983July 1987ISA, 8-bit82Intel 80884.77320 KB640 KB360 KBnoneWithout fixed disk adapter; stock onboard RAM increased to 384 KB in June 198489: 49 9091: 10 92
3270 PC5271-006October 1983July 1987ISA, 8-bit82Intel 80884.77320 KB640 KB360 KB10 MBWith fixed disk adapter; stock onboard RAM increased to 384 KB in June 198493: 49 9495: 10 96
Personal Computer XT/3705160-568October 1984April 1987ISA, 8-bit82Intel 80884.77256 KB640 KB360 KBnone97: 236 9899
Personal Computer XT/3705160-588October 1984April 1987ISA, 8-bit82Intel 80884.77256 KB640 KB360 KB10 MB100: 236 101102
Personal Computer XT/3705160-589October 1984April 1987ISA, 8-bit82Intel 80884.77256 KB640 KB360 KB10 MB103: 236 104
PCjr4860-004November 1983March 1985Custom——Intel 80884.7764 KB128 KBnonenone 105106
PCjr4860-067November 1983March 1985Custom——Intel 80884.77128 KB128 KB360 KBnone 107108
Portable Personal Computer5155-068February 1984June 1984ISA, 8-bit82Intel 80884.77256 KB512 KB360 KBnone109
Portable Personal Computer5155-076June 1984Un­knownISA, 8-bit82Intel 80884.77256 KB512 KBtwo 360 KBnone110: 228 111
Personal Computer AT5170-068August 1984June 1987ISA, 16-bit83Intel 802866256 KB512 KB1.2 MBnone 112: 49 113114
Personal Computer AT5170-099August 1984June 1987ISA, 16-bit83Intel 802866512 KB512 KB1.2 MB20 MB 115: 236 116117
Personal Computer AT5170-239October 1985September 1986ISA, 16-bit83Intel 802866512 KB512 KB1.2 MB30 MB 118: 236 119120
Personal Computer AT5170-839January 1986June 1987ISA, 16-bit83Intel 802866512 KB512 KB1.2 MBtwo 30 MBIncludes controllers for the IBM 4680 Store System121: 236 122123
Personal Computer AT5170-899January 1986June 1987ISA, 16-bit83Intel 802866512 KB512 KB1.2 MBtwo 20 MBIncludes controllers for the IBM 4680 Store System124: 236 125126
Personal Computer AT5170-319April 1986June 1987ISA, 16-bit83Intel 802868512 KB512 KB1.2 MB30 MB 127: 236 128129
Personal Computer AT5170-339April 1986July 1987ISA, 16-bit83Intel 802868512 KB512 KB1.2 MB30 MBShipped with Enhanced Keyboard130: 236 131132
Personal Computer AT5171-168October 1986June 1987ISA, 16-bit83Intel 802868512 KB512 KB1.2 MBnoneBuilt to TEMPEST specifications133: 64 134
Personal Computer AT5171-339October 1986July 1987ISA, 16-bit83Intel 802868512 KB512 KB1.2 MB30 MBBuilt to TEMPEST specifications135: 64 136
Personal Computer AT/3705170-599October 1984April 1987ISA, 16-bit83Intel 802866512 KB512 KB1.2 MB20 MB137: 202 138
Personal Computer AT/3705170-739October 1985April 1987ISA, 16-bit83Intel 802866512 KB512 KB1.2 MB30 MB 139: 202 140141142
Personal Computer AT/3705170-919April 1986April 1987ISA, 16-bit83Intel 802866512 KB512 KB1.2 MB30 MB1 MB total RAM (peripheral)143: 57 144145
Personal Computer AT/3705170-939April 1986April 1987ISA, 16-bit83Intel 802866512 KB512 KB1.2 MB30 MB1 MB total RAM (peripheral); shipped with Enhanced Keyboard146: 57 147148
PC Convertible5140-002April 1986Un­knownISA, 8-bit (proprietary)——Intel 80884.77256 KB512 KBtwo 720KnoneApplication bundle
PC Convertible5140-022April 1986Un­knownISA, 8-bit (proprietary)——Intel 80884.77256 KB512 KBtwo 720Knone
Personal Computer XT Model 2865162-286September 1986October 1987ISA, 16-bit82Intel 802866640 KB640 KB1.2 MB20 MB 149: 48 150151
Industrial Computer 55315531-001October 1983Un­knownISA, 8-bit83Intel 80884.77128 KB640 KB360 KB10 MBIndustrial version of the IBM PC XT152153
Industrial Computer 55315531-011April 1984Un­knownISA, 8-bit83Intel 80884.77256 KB640 KB1.2 MBnoneIndustrial version of the IBM PC XT154155156
Industrial Computer 55315531-021May 1985Un­knownISA, 8-bit83Intel 80884.77256 KB640 KB1.2 MB20 MBIndustrial version of the IBM PC XT157158
7531 Industrial Computer7531-041May 1985Un­knownISA, 16-bit83Intel 802866512 KB1 MBUn­knownUn­knownIndustrial version of the IBM PC AT, tower form-factor
7532 Industrial Computer7532-041May 1985Un­knownISA, 16-bit83Intel 802866512 KB1 MBUn­knownUn­knownIndustrial version of the IBM PC AT, 19-inch rack-mountable form factor
Industrial Computer 75527552-040October 1986Un­knownISA, 16-bitMCA, 16-bit (undocumented)8 (modules, 7 fillable)3 (as modules)Intel 80286104 MBUn­knownnonenoneAlso 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 1987159160161162
Industrial Computer 75527552-140October 1986Un­knownISA, 16-bitMCA, 16-bit (undocumented)8 (modules, 7 fillable)3 (as modules)Intel 80286104 MBUn­knownone 1.44 MB (as a module)20 MB (as a module, 40 MB as two identical modules)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 1987163164165166

Successor lines

Timeline

Timeline of the IBM Personal Computer
  • v
  • t
  • e
Asterisk (*) denotes a model released in Japan only

See also

General references

Footnotes

References

  1. Hogan, Thom (September 14, 1981). "IBM Announces New Microcomputer System". InfoWorld. 3 (18). IDG Publications: 1, 14 – via Google Books. https://books.google.com/books?id=Mj0EAAAAMBAJ&pg=PA1 ↩

  2. Mueller, Scott (1994). Upgrading and Repairing PCs (4th ed.). Que. ISBN 9781565299320 – via the Internet Archive. 9781565299320 ↩

  3. Somerson, Paul (April 1983). "Revised Figures". PC Magazine. 1 (12). Ziff-Davis: 102 – via Google Books. https://books.google.com/books?id=7wCiNAUEuAMC&pg=RA2-PA102 ↩

  4. Hogan, Thom (September 14, 1981). "IBM Announces New Microcomputer System". InfoWorld. 3 (18). IDG Publications: 1, 14 – via Google Books. https://books.google.com/books?id=Mj0EAAAAMBAJ&pg=PA1 ↩

  5. Ditela, Steve (December 14, 1981). "Wizard in Your Home". New York. 14 (49): 46–72 – via Google Books. https://books.google.com/books?id=_uUCAAAAMBAJ&pg=PA47 ↩

  6. Mueller, Scott (1994). Upgrading and Repairing PCs (4th ed.). Que. ISBN 9781565299320 – via the Internet Archive. 9781565299320 ↩

  7. Somerson, Paul (April 1983). "Revised Figures". PC Magazine. 1 (12). Ziff-Davis: 102 – via Google Books. https://books.google.com/books?id=7wCiNAUEuAMC&pg=RA2-PA102 ↩

  8. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  9. Machine Preface. IBM Information Systems Group. November 1983. p. MP 1.4 – via the Internet Archive. https://archive.org/details/bitsavers_ibmserviceceForConsultants198312Complete13MachineP_2254559/page/n3/ ↩

  10. Somerson, Paul (April 1983). "Revised Figures". PC Magazine. 1 (12). Ziff-Davis: 102 – via Google Books. https://books.google.com/books?id=7wCiNAUEuAMC&pg=RA2-PA102 ↩

  11. A Guide to IBM Personal Computers (PDF). International Business Machines Corporation. April 1985 – via Ardent Tool. https://ardent-tool.com/docs/pdf/GC20-8210-00_A_Guide_to_IBM_Personal_Computers_Apr85.pdf#page=50 ↩

  12. Machine Preface. IBM Information Systems Group. November 1983. p. MP 1.4 – via the Internet Archive. https://archive.org/details/bitsavers_ibmserviceceForConsultants198312Complete13MachineP_2254559/page/n3/ ↩

  13. Somerson, Paul (April 1983). "Revised Figures". PC Magazine. 1 (12). Ziff-Davis: 102 – via Google Books. https://books.google.com/books?id=7wCiNAUEuAMC&pg=RA2-PA102 ↩

  14. Machine Preface. IBM Information Systems Group. November 1983. p. MP 1.4 – via the Internet Archive. https://archive.org/details/bitsavers_ibmserviceceForConsultants198312Complete13MachineP_2254559/page/n3/ ↩

  15. Somerson, Paul (April 1983). "Revised Figures". PC Magazine. 1 (12). Ziff-Davis: 102 – via Google Books. https://books.google.com/books?id=7wCiNAUEuAMC&pg=RA2-PA102 ↩

  16. Machine Preface. IBM Information Systems Group. November 1983. p. MP 1.4 – via the Internet Archive. https://archive.org/details/bitsavers_ibmserviceceForConsultants198312Complete13MachineP_2254559/page/n3/ ↩

  17. "IBM PC 1, PC/XT & Portable PC Personal Computers". Microcomputer Systems. 3. Data Decisions: 13. 1984 – via the Internet Archive. https://archive.org/details/bitsavers_dataDecisirSystemsVol30950_10370583/page/13/ ↩

  18. Somerson, Paul (April 1983). "Revised Figures". PC Magazine. 1 (12). Ziff-Davis: 102 – via Google Books. https://books.google.com/books?id=7wCiNAUEuAMC&pg=RA2-PA102 ↩

  19. Machine Preface. IBM Information Systems Group. November 1983. p. MP 1.4 – via the Internet Archive. https://archive.org/details/bitsavers_ibmserviceceForConsultants198312Complete13MachineP_2254559/page/n3/ ↩

  20. "IBM PC 1, PC/XT & Portable PC Personal Computers". Microcomputer Systems. 3. Data Decisions: 13. 1984 – via the Internet Archive. https://archive.org/details/bitsavers_dataDecisirSystemsVol30950_10370583/page/13/ ↩

  21. Somerson, Paul (April 1983). "Revised Figures". PC Magazine. 1 (12). Ziff-Davis: 102 – via Google Books. https://books.google.com/books?id=7wCiNAUEuAMC&pg=RA2-PA102 ↩

  22. Machine Preface. IBM Information Systems Group. November 1983. p. MP 1.4 – via the Internet Archive. https://archive.org/details/bitsavers_ibmserviceceForConsultants198312Complete13MachineP_2254559/page/n3/ ↩

  23. "IBM PC 1, PC/XT & Portable PC Personal Computers". Microcomputer Systems. 3. Data Decisions: 13. 1984 – via the Internet Archive. https://archive.org/details/bitsavers_dataDecisirSystemsVol30950_10370583/page/13/ ↩

  24. Somerson, Paul (April 1983). "Revised Figures". PC Magazine. 1 (12). Ziff-Davis: 102 – via Google Books. https://books.google.com/books?id=7wCiNAUEuAMC&pg=RA2-PA102 ↩

  25. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  26. "IBM PC 1, PC/XT & Portable PC Personal Computers". Microcomputer Systems. 3. Data Decisions: 13. 1984 – via the Internet Archive. https://archive.org/details/bitsavers_dataDecisirSystemsVol30950_10370583/page/13/ ↩

  27. IBM Personal Computer Hardware Prices (PDF). IBM Product Center. June 1984. p. obverse – via the Vintage Technology Digital Archive. https://vtda.org/docs/computing/IBM/Micro/PC/IBM_PC_HardwarePricesJune84.pdf ↩

  28. Staff writer (June 12, 1984). "IBM Cuts Prices, Ups RAM". PC Week. 1 (23). Ziff-Davis: 1 – via 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. https://link.gale.com/apps/doc/A585059/GPS?sid=wikipedia ↩

  29. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  30. "IBM PC 1, PC/XT & Portable PC Personal Computers". Microcomputer Systems. 3. Data Decisions: 13. 1984 – via the Internet Archive. https://archive.org/details/bitsavers_dataDecisirSystemsVol30950_10370583/page/13/ ↩

  31. IBM Personal Computer Hardware Prices (PDF). IBM Product Center. June 1984. p. obverse – via the Vintage Technology Digital Archive. https://vtda.org/docs/computing/IBM/Micro/PC/IBM_PC_HardwarePricesJune84.pdf ↩

  32. Staff writer (June 12, 1984). "IBM Cuts Prices, Ups RAM". PC Week. 1 (23). Ziff-Davis: 1 – via 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. https://link.gale.com/apps/doc/A585059/GPS?sid=wikipedia ↩

  33. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  34. "IBM PC 1, PC/XT & Portable PC Personal Computers". Microcomputer Systems. 3. Data Decisions: 13. 1984 – via the Internet Archive. https://archive.org/details/bitsavers_dataDecisirSystemsVol30950_10370583/page/13/ ↩

  35. Staff writer (June 12, 1984). "IBM Cuts Prices, Ups RAM". PC Week. 1 (23). Ziff-Davis: 1 – via 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. https://link.gale.com/apps/doc/A585059/GPS?sid=wikipedia ↩

  36. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  37. "IBM PC 1, PC/XT & Portable PC Personal Computers". Microcomputer Systems. 3. Data Decisions: 13. 1984 – via the Internet Archive. https://archive.org/details/bitsavers_dataDecisirSystemsVol30950_10370583/page/13/ ↩

  38. IBM Personal Computer Hardware Prices (PDF). IBM Product Center. June 1984. p. obverse – via the Vintage Technology Digital Archive. https://vtda.org/docs/computing/IBM/Micro/PC/IBM_PC_HardwarePricesJune84.pdf ↩

  39. Machine Preface. IBM Information Systems Group. November 1983. p. MP 1.4 – via the Internet Archive. https://archive.org/details/bitsavers_ibmserviceceForConsultants198312Complete13MachineP_2254559/page/n3/ ↩

  40. Staff writer (June 12, 1984). "IBM Cuts Prices, Ups RAM". PC Week. 1 (23). Ziff-Davis: 1 – via 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. https://link.gale.com/apps/doc/A585059/GPS?sid=wikipedia ↩

  41. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  42. Staff writer (June 11, 1984). "IBM Slashes PC Prices, Adds Memory; Drops 64KB". Electronic News. 30 (1501). Sage Publications: 24 – via Gale. https://link.gale.com/apps/doc/A554458/GPS?sid=wikipedia ↩

  43. Staff writer (June 12, 1984). "IBM Cuts Prices, Ups RAM". PC Week. 1 (23). Ziff-Davis: 1 – via 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. https://link.gale.com/apps/doc/A585059/GPS?sid=wikipedia ↩

  44. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  45. Staff writer (June 11, 1984). "IBM Slashes PC Prices, Adds Memory; Drops 64KB". Electronic News. 30 (1501). Sage Publications: 24 – via Gale. https://link.gale.com/apps/doc/A554458/GPS?sid=wikipedia ↩

  46. Staff writer (June 12, 1984). "IBM Cuts Prices, Ups RAM". PC Week. 1 (23). Ziff-Davis: 1 – via 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. https://link.gale.com/apps/doc/A585059/GPS?sid=wikipedia ↩

  47. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  48. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  49. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  50. Sandler, Corey (April 1983). "IBM Drops the First Shoe". PC Magazine. 1 (12). Ziff-Davis: 90–102 – via Google Books. https://books.google.com/books?id=7wCiNAUEuAMC&pg=RA2-PA90 ↩

  51. Mueller, Scott (1994). Upgrading and Repairing PCs (4th ed.). Que. ISBN 9781565299320 – via the Internet Archive. 9781565299320 ↩

  52. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  53. Staff writer (June 11, 1984). "IBM Slashes PC Prices, Adds Memory; Drops 64KB". Electronic News. 30 (1501). Sage Publications: 24 – via Gale. https://link.gale.com/apps/doc/A554458/GPS?sid=wikipedia ↩

  54. Sanger, David E. (June 24, 1987). "I.B.M. Optimistic on Newest PC's". The New York Times: D4 – via ProQuest. https://www.proquest.com/docview/426534977/ ↩

  55. Bridges, Linda; Laura Brennan; Jim Forbes; Bruce Stephen (July 7, 1987). "PC managers regrouping after XT, AT closeout". PC Week. 4 (27). Ziff-Davis: 4 – via 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. https://link.gale.com/apps/doc/A5027977/GPS?sid=wikipedia ↩

  56. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  57. Mueller, Scott (1994). Upgrading and Repairing PCs (4th ed.). Que. ISBN 9781565299320 – via the Internet Archive. 9781565299320 ↩

  58. Sager, Ira (April 8, 1985). "IBM moves to reduce PC XT inventories". Electronic News. 31. Sage Publications: 24 et seq – via 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. https://link.gale.com/apps/doc/A3723060/GPS?sid=wikipedia ↩

  59. Sanger, David E. (June 24, 1987). "I.B.M. Optimistic on Newest PC's". The New York Times: D4 – via ProQuest. https://www.proquest.com/docview/426534977/ ↩

  60. Bridges, Linda; Laura Brennan; Jim Forbes; Bruce Stephen (July 7, 1987). "PC managers regrouping after XT, AT closeout". PC Week. 4 (27). Ziff-Davis: 4 – via 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. https://link.gale.com/apps/doc/A5027977/GPS?sid=wikipedia ↩

  61. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  62. Mueller, Scott (1994). Upgrading and Repairing PCs (4th ed.). Que. ISBN 9781565299320 – via the Internet Archive. 9781565299320 ↩

  63. Sager, Ira (April 8, 1985). "IBM moves to reduce PC XT inventories". Electronic News. 31. Sage Publications: 24 et seq – via 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. https://link.gale.com/apps/doc/A3723060/GPS?sid=wikipedia ↩

  64. Sanger, David E. (June 24, 1987). "I.B.M. Optimistic on Newest PC's". The New York Times: D4 – via ProQuest. https://www.proquest.com/docview/426534977/ ↩

  65. Bridges, Linda; Laura Brennan; Jim Forbes; Bruce Stephen (July 7, 1987). "PC managers regrouping after XT, AT closeout". PC Week. 4 (27). Ziff-Davis: 4 – via 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. https://link.gale.com/apps/doc/A5027977/GPS?sid=wikipedia ↩

  66. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  67. Whitmore, Sam (April 8, 1986). "Product blitz may signal more aggressive IBM: firm ups ante for the makers of compatibles". PC Week. 3 (14). Ziff-Davis: 1 – via Gale. https://link.gale.com/apps/doc/A666904/GPS?sid=wikipedia ↩

  68. Sanger, David E. (June 24, 1987). "I.B.M. Optimistic on Newest PC's". The New York Times: D4 – via ProQuest. https://www.proquest.com/docview/426534977/ ↩

  69. Bridges, Linda; Laura Brennan; Jim Forbes; Bruce Stephen (July 7, 1987). "PC managers regrouping after XT, AT closeout". PC Week. 4 (27). Ziff-Davis: 4 – via 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. https://link.gale.com/apps/doc/A5027977/GPS?sid=wikipedia ↩

  70. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  71. Whitmore, Sam (April 8, 1986). "Product blitz may signal more aggressive IBM: firm ups ante for the makers of compatibles". PC Week. 3 (14). Ziff-Davis: 1 – via Gale. https://link.gale.com/apps/doc/A666904/GPS?sid=wikipedia ↩

  72. Sanger, David E. (June 24, 1987). "I.B.M. Optimistic on Newest PC's". The New York Times: D4 – via ProQuest. https://www.proquest.com/docview/426534977/ ↩

  73. Bridges, Linda; Laura Brennan; Jim Forbes; Bruce Stephen (July 7, 1987). "PC managers regrouping after XT, AT closeout". PC Week. 4 (27). Ziff-Davis: 4 – via 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. https://link.gale.com/apps/doc/A5027977/GPS?sid=wikipedia ↩

  74. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  75. Whitmore, Sam (April 8, 1986). "Product blitz may signal more aggressive IBM: firm ups ante for the makers of compatibles". PC Week. 3 (14). Ziff-Davis: 1 – via Gale. https://link.gale.com/apps/doc/A666904/GPS?sid=wikipedia ↩

  76. Sanger, David E. (June 24, 1987). "I.B.M. Optimistic on Newest PC's". The New York Times: D4 – via ProQuest. https://www.proquest.com/docview/426534977/ ↩

  77. Bridges, Linda; Laura Brennan; Jim Forbes; Bruce Stephen (July 7, 1987). "PC managers regrouping after XT, AT closeout". PC Week. 4 (27). Ziff-Davis: 4 – via 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. https://link.gale.com/apps/doc/A5027977/GPS?sid=wikipedia ↩

  78. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  79. Whitmore, Sam (April 8, 1986). "Product blitz may signal more aggressive IBM: firm ups ante for the makers of compatibles". PC Week. 3 (14). Ziff-Davis: 1 – via Gale. https://link.gale.com/apps/doc/A666904/GPS?sid=wikipedia ↩

  80. Whitmore, Sam (April 8, 1986). "Product blitz may signal more aggressive IBM: firm ups ante for the makers of compatibles". PC Week. 3 (14). Ziff-Davis: 1 – via Gale. https://link.gale.com/apps/doc/A666904/GPS?sid=wikipedia ↩

  81. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  82. Whitmore, Sam (April 8, 1986). "Product blitz may signal more aggressive IBM: firm ups ante for the makers of compatibles". PC Week. 3 (14). Ziff-Davis: 1 – via Gale. https://link.gale.com/apps/doc/A666904/GPS?sid=wikipedia ↩

  83. "IBM 3770 Family Batch Communications Terminals" (PDF). Distributed Processing & Intelligent Terminals. Datapro: C21-491-101. January 1984 – via Bitsavers.org. http://www.bitsavers.org/pdf/datapro/programmable_terminals/Datapro_C21_IBM.pdf#page=62 ↩

  84. Libes, Sol (February 28, 1984). "3270 emulation board makers, beware! IBM is aiming at you". PC Week. 1 (28). Ziff-Davis: 25 et seq – via Gale. https://link.gale.com/apps/doc/A3150465/GPS?sid=wikipedia ↩

  85. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  86. Staff writer (June 11, 1984). "IBM Slashes PC Prices, Adds Memory; Drops 64KB". Electronic News. 30 (1501). Sage Publications: 24 – via Gale. https://link.gale.com/apps/doc/A554458/GPS?sid=wikipedia ↩

  87. Henkel, T. (October 24, 1983). "IBM Takes Wraps off Two Micros Capable of Accessing Mainframes". Computerworld. 17 (43). IDG Publications: 1, 10 – via Google Books. https://books.google.com/books?id=wFqbDqPhSMcC&pg=PA1 ↩

  88. Libes, Sol (February 28, 1984). "3270 emulation board makers, beware! IBM is aiming at you". PC Week. 1 (28). Ziff-Davis: 25 et seq – via Gale. https://link.gale.com/apps/doc/A3150465/GPS?sid=wikipedia ↩

  89. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  90. Staff writer (June 11, 1984). "IBM Slashes PC Prices, Adds Memory; Drops 64KB". Electronic News. 30 (1501). Sage Publications: 24 – via Gale. https://link.gale.com/apps/doc/A554458/GPS?sid=wikipedia ↩

  91. Henkel, T. (October 24, 1983). "IBM Takes Wraps off Two Micros Capable of Accessing Mainframes". Computerworld. 17 (43). IDG Publications: 1, 10 – via Google Books. https://books.google.com/books?id=wFqbDqPhSMcC&pg=PA1 ↩

  92. Libes, Sol (February 28, 1984). "3270 emulation board makers, beware! IBM is aiming at you". PC Week. 1 (28). Ziff-Davis: 25 et seq – via Gale. https://link.gale.com/apps/doc/A3150465/GPS?sid=wikipedia ↩

  93. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  94. Staff writer (June 11, 1984). "IBM Slashes PC Prices, Adds Memory; Drops 64KB". Electronic News. 30 (1501). Sage Publications: 24 – via Gale. https://link.gale.com/apps/doc/A554458/GPS?sid=wikipedia ↩

  95. Henkel, T. (October 24, 1983). "IBM Takes Wraps off Two Micros Capable of Accessing Mainframes". Computerworld. 17 (43). IDG Publications: 1, 10 – via Google Books. https://books.google.com/books?id=wFqbDqPhSMcC&pg=PA1 ↩

  96. Libes, Sol (February 28, 1984). "3270 emulation board makers, beware! IBM is aiming at you". PC Week. 1 (28). Ziff-Davis: 25 et seq – via Gale. https://link.gale.com/apps/doc/A3150465/GPS?sid=wikipedia ↩

  97. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  98. Henkel, T. (October 24, 1983). "IBM Takes Wraps off Two Micros Capable of Accessing Mainframes". Computerworld. 17 (43). IDG Publications: 1, 10 – via Google Books. https://books.google.com/books?id=wFqbDqPhSMcC&pg=PA1 ↩

  99. "IBM Gives Up on the Personal XT/, AT/370". Computer Business Review. New Statesman Media Group. April 13, 1987. Archived from the original on September 20, 2023. https://archive.today/20230920021426/https://techmonitor.ai/technology/ibm_gives_up_on_the_personal_xt_at370 ↩

  100. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  101. Henkel, T. (October 24, 1983). "IBM Takes Wraps off Two Micros Capable of Accessing Mainframes". Computerworld. 17 (43). IDG Publications: 1, 10 – via Google Books. https://books.google.com/books?id=wFqbDqPhSMcC&pg=PA1 ↩

  102. "IBM Gives Up on the Personal XT/, AT/370". Computer Business Review. New Statesman Media Group. April 13, 1987. Archived from the original on September 20, 2023. https://archive.today/20230920021426/https://techmonitor.ai/technology/ibm_gives_up_on_the_personal_xt_at370 ↩

  103. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  104. "IBM Gives Up on the Personal XT/, AT/370". Computer Business Review. New Statesman Media Group. April 13, 1987. Archived from the original on September 20, 2023. https://archive.today/20230920021426/https://techmonitor.ai/technology/ibm_gives_up_on_the_personal_xt_at370 ↩

  105. "IBM PCjr". Microcomputer Systems. 3. Data Decisions: 6. 1984 – via the Internet Archive. https://archive.org/details/bitsavers_dataDecisirSystemsVol30950_10370583/page/n23/ ↩

  106. Castro, Janice; Bob Buderi; Thomas McCarroll (April 1, 1985). "Kicking Junior Out of the Family". Time. Time Inc. Archived from the original on June 25, 2009. Retrieved February 23, 2011. https://web.archive.org/web/20090625185216/http://www.time.com/time/magazine/article/0%2C9171%2C964850%2C00.html ↩

  107. "IBM PCjr". Microcomputer Systems. 3. Data Decisions: 6. 1984 – via the Internet Archive. https://archive.org/details/bitsavers_dataDecisirSystemsVol30950_10370583/page/n23/ ↩

  108. Castro, Janice; Bob Buderi; Thomas McCarroll (April 1, 1985). "Kicking Junior Out of the Family". Time. Time Inc. Archived from the original on June 25, 2009. Retrieved February 23, 2011. https://web.archive.org/web/20090625185216/http://www.time.com/time/magazine/article/0%2C9171%2C964850%2C00.html ↩

  109. "IBM PC 1, PC/XT & Portable PC Personal Computers". Microcomputer Systems. 3. Data Decisions: 13. 1984 – via the Internet Archive. https://archive.org/details/bitsavers_dataDecisirSystemsVol30950_10370583/page/13/ ↩

  110. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  111. Staff writer (June 18, 1984). "IBM cuts micro prices". Computerworld. XVIII (25). IDG Publications: 8 – via Google Books. https://books.google.com/books?id=aqjZTUJlyygC&pg=PA8 ↩

  112. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  113. Whitmore, Sam (August 14, 1984). "IBM's New Generation: The PC AT: AT Hikes CPU Speed Sixfold, Memory Fivefold". PC Week. 1 (32). Ziff-Davis: 1 – via 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. https://link.gale.com/apps/doc/A573108/GPS?sid=wikipedia ↩

  114. Abruzzese, George (June 29, 1987). "IBM Plans to Terminate Remainder of PC Line". InfoWorld. 9 (26). IDG Publications: 1, 69 – via Google Books. https://books.google.com/books?id=xjAEAAAAMBAJ&pg=PA1 ↩

  115. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  116. Whitmore, Sam (August 14, 1984). "IBM's New Generation: The PC AT: AT Hikes CPU Speed Sixfold, Memory Fivefold". PC Week. 1 (32). Ziff-Davis: 1 – via 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. https://link.gale.com/apps/doc/A573108/GPS?sid=wikipedia ↩

  117. Abruzzese, George (June 29, 1987). "IBM Plans to Terminate Remainder of PC Line". InfoWorld. 9 (26). IDG Publications: 1, 69 – via Google Books. https://books.google.com/books?id=xjAEAAAAMBAJ&pg=PA1 ↩

  118. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  119. Kuzbyt, Bob (October 7, 1985). "IBM introduces 30-MB 5.25-inch Winchester disk drive for AT". Electronic News. 31. Sage Publications: 26 – via Gale. https://link.gale.com/apps/doc/A3972202/GPS?sid=wikipedia ↩

  120. Ristelhueber, Robert; Ira Sager (September 8, 1986). "4 PC suppliers add 286 units in battle with compatibles". Electronic News. 32. Sage Publications: 1 et seq – via Gale. https://link.gale.com/apps/doc/A4398861/GPS?sid=wikipedia ↩

  121. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  122. Whitmore, Sam (January 14, 1986). "IBM Debuts PC AT-Based Point-of-Sale Retail System". PC Week. 3 (2). Ziff-Davis: 8 – via Gale. https://link.gale.com/apps/doc/A656864/GPS?sid=wikipedia ↩

  123. Abruzzese, George (June 29, 1987). "IBM Plans to Terminate Remainder of PC Line". InfoWorld. 9 (26). IDG Publications: 1, 69 – via Google Books. https://books.google.com/books?id=xjAEAAAAMBAJ&pg=PA1 ↩

  124. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  125. Whitmore, Sam (January 14, 1986). "IBM Debuts PC AT-Based Point-of-Sale Retail System". PC Week. 3 (2). Ziff-Davis: 8 – via Gale. https://link.gale.com/apps/doc/A656864/GPS?sid=wikipedia ↩

  126. Abruzzese, George (June 29, 1987). "IBM Plans to Terminate Remainder of PC Line". InfoWorld. 9 (26). IDG Publications: 1, 69 – via Google Books. https://books.google.com/books?id=xjAEAAAAMBAJ&pg=PA1 ↩

  127. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  128. Whitmore, Sam (April 1, 1986). "IBM meetings said to key on new products". PC Week. 3 (13). Ziff-Davis: 1 – via Gale. https://link.gale.com/apps/doc/A666974/GPS?sid=wikipedia ↩

  129. Abruzzese, George (June 29, 1987). "IBM Plans to Terminate Remainder of PC Line". InfoWorld. 9 (26). IDG Publications: 1, 69 – via Google Books. https://books.google.com/books?id=xjAEAAAAMBAJ&pg=PA1 ↩

  130. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  131. Whitmore, Sam (April 1, 1986). "IBM meetings said to key on new products". PC Week. 3 (13). Ziff-Davis: 1 – via Gale. https://link.gale.com/apps/doc/A666974/GPS?sid=wikipedia ↩

  132. Abruzzese, George (June 29, 1987). "IBM Plans to Terminate Remainder of PC Line". InfoWorld. 9 (26). IDG Publications: 1, 69 – via Google Books. https://books.google.com/books?id=xjAEAAAAMBAJ&pg=PA1 ↩

  133. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  134. Abruzzese, George (June 29, 1987). "IBM Plans to Terminate Remainder of PC Line". InfoWorld. 9 (26). IDG Publications: 1, 69 – via Google Books. https://books.google.com/books?id=xjAEAAAAMBAJ&pg=PA1 ↩

  135. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  136. Abruzzese, George (June 29, 1987). "IBM Plans to Terminate Remainder of PC Line". InfoWorld. 9 (26). IDG Publications: 1, 69 – via Google Books. https://books.google.com/books?id=xjAEAAAAMBAJ&pg=PA1 ↩

  137. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  138. "IBM Gives Up on the Personal XT/, AT/370". Computer Business Review. New Statesman Media Group. April 13, 1987. Archived from the original on September 20, 2023. https://archive.today/20230920021426/https://techmonitor.ai/technology/ibm_gives_up_on_the_personal_xt_at370 ↩

  139. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  140. Sandker, C. (October 8, 1985). "IBM Delivers New PC AT Featuring 30M-Byte Disk: Sets a Price Tag of $5,995". PC Week. 2 (40). Ziff-Davis: 1 – via Gale. https://link.gale.com/apps/doc/A649986/GPS?sid=wikipedia ↩

  141. "Desktop Systems". PC Tech Journal. 4 (13). Ziff-Davis: 69. 1987 – via the Internet Archive. https://archive.org/details/PC_Tech_Journal_vol04_n13/page/69/ ↩

  142. "IBM Gives Up on the Personal XT/, AT/370". Computer Business Review. New Statesman Media Group. April 13, 1987. Archived from the original on September 20, 2023. https://archive.today/20230920021426/https://techmonitor.ai/technology/ibm_gives_up_on_the_personal_xt_at370 ↩

  143. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  144. Kennedy, Don (April 2, 1986). "IBM has boosted the processor speed and storage capacity of its personal computer models". PR Newswire. p. NYPR14C – via Gale. https://link.gale.com/apps/doc/A4196480/GPS?sid=wikipedia ↩

  145. "IBM Gives Up on the Personal XT/, AT/370". Computer Business Review. New Statesman Media Group. April 13, 1987. Archived from the original on September 20, 2023. https://archive.today/20230920021426/https://techmonitor.ai/technology/ibm_gives_up_on_the_personal_xt_at370 ↩

  146. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  147. Kennedy, Don (April 2, 1986). "IBM has boosted the processor speed and storage capacity of its personal computer models". PR Newswire. p. NYPR14C – via Gale. https://link.gale.com/apps/doc/A4196480/GPS?sid=wikipedia ↩

  148. "IBM Gives Up on the Personal XT/, AT/370". Computer Business Review. New Statesman Media Group. April 13, 1987. Archived from the original on September 20, 2023. https://archive.today/20230920021426/https://techmonitor.ai/technology/ibm_gives_up_on_the_personal_xt_at370 ↩

  149. IBM Personal System/2 and IBM Personal Computer Product Reference (PDF) (4.0 ed.). International Business Machines Corporation. April 6, 1987 – via Bitsavers. https://bitsavers.org/pdf/ibm/pc/PS2_and_IBM_PC_Product_Reference_Version_4.0_Apr87.pdf#page=244 ↩

  150. Ristelhueber, Robert; Ira Sager (September 8, 1986). "4 PC suppliers add 286 units in battle with compatibles". Electronic News. 32. Sage Publications: 1 et seq – via Gale. https://link.gale.com/apps/doc/A4398861/GPS?sid=wikipedia ↩

  151. Bridges, Linda; Laura Brennan; Jim Forbes; Bruce Stephen (July 7, 1987). "PC managers regrouping after XT, AT closeout". PC Week. 4 (27). Ziff-Davis: 4 – via 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. https://link.gale.com/apps/doc/A5027977/GPS?sid=wikipedia ↩

  152. Staff writer (April 25, 1984). "Industrial-strength PC XT". UPI.com. United Press International. Archived from the original on September 20, 2023. https://archive.today/20230920211216/https://www.upi.com/Archives/1984/04/25/Industrial-strength-PC-XT/2249451717200/ ↩

  153. "IBM 7531 Industrial Computer" (Announcement letter). International Business Machines Corporation. May 21, 1985. 185-053. https://www.ibm.com/docs/announcements/archive/ENUS185-053 ↩

  154. Staff writer (April 25, 1984). "Industrial-strength PC XT". UPI.com. United Press International. Archived from the original on September 20, 2023. https://archive.today/20230920211216/https://www.upi.com/Archives/1984/04/25/Industrial-strength-PC-XT/2249451717200/ ↩

  155. "IBM 7531 Industrial Computer" (Announcement letter). International Business Machines Corporation. May 21, 1985. 185-053. https://www.ibm.com/docs/announcements/archive/ENUS185-053 ↩

  156. "IBM unveils entry-level 5531 model". Computerworld. XIX (17). IDG Publications: 48. April 29, 1985 – via Google Books. https://books.google.com/books?id=_AXj28q1BDkC&pg=RA1-PA48 ↩

  157. Staff writer (April 25, 1984). "Industrial-strength PC XT". UPI.com. United Press International. Archived from the original on September 20, 2023. https://archive.today/20230920211216/https://www.upi.com/Archives/1984/04/25/Industrial-strength-PC-XT/2249451717200/ ↩

  158. "IBM 7531 Industrial Computer" (Announcement letter). International Business Machines Corporation. May 21, 1985. 185-053. https://www.ibm.com/docs/announcements/archive/ENUS185-053 ↩

  159. "IBM 7552 Industrial Computer Model 540" (Announcement Letter). Industrial Business Machines Corporation. November 3, 1987. Retrieved January 19, 2025. https://www.ibm.com/docs/announcements/archive/ENUS187-224 ↩

  160. Kono, M. E. (December 1992). Surface Computer System Architecture for the Advanced Unmanned Search System (AUSS) (PDF). Naval Command, Control and Ocean Surveillance Center. p. 3 – via Ardent Tool. https://ardent-tool.com/7552/DTIC_ADA263239.pdf#page=11 ↩

  161. Wallace, Bob (October 20, 1986). "IBM uncloaks industrial micro as network gateway". Network World. 3 (33). IDG Publications – via Google Books. https://books.google.com/books?id=nxwEAAAAMBAJ&pg=PA21 ↩

  162. Cleaveland, Peter (April 21, 1987). "Low-cost, flexible microcomputers get jobs in factories". Instrumentation & Control Systems. 61 (5). Reed Business Information Enterprise: 31 – via 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. ↩

  163. "IBM 7552 Industrial Computer Model 540" (Announcement Letter). Industrial Business Machines Corporation. November 3, 1987. Retrieved January 19, 2025. https://www.ibm.com/docs/announcements/archive/ENUS187-224 ↩

  164. Kono, M. E. (December 1992). Surface Computer System Architecture for the Advanced Unmanned Search System (AUSS) (PDF). Naval Command, Control and Ocean Surveillance Center. p. 3 – via Ardent Tool. https://ardent-tool.com/7552/DTIC_ADA263239.pdf#page=11 ↩

  165. Wallace, Bob (October 20, 1986). "IBM uncloaks industrial micro as network gateway". Network World. 3 (33). IDG Publications – via Google Books. https://books.google.com/books?id=nxwEAAAAMBAJ&pg=PA21 ↩

  166. Cleaveland, Peter (April 21, 1987). "Low-cost, flexible microcomputers get jobs in factories". Instrumentation & Control Systems. 61 (5). Reed Business Information Enterprise: 31 – via 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. ↩