IBM PS/2 Model 57
| Company type | Product line |
|---|---|
| Industry | Personal computers |
| Predecessor | IBM PC family |
| Founded | 1987 |
| Founder | International Business Machines Corporation (IBM) |
| Fate | Succeeded original IBM PC family |
| Headquarters | United States |
Area served | Worldwide |
| Products | Personal computers (desktops, towers, all-in-one, portable, notebook) |
| Owner | IBM |
| Parent | IBM |
The Personal System/2, commonly known as PS/2, represented a series of personal computers created by International Business Machines Corporation (IBM). Launched in 1987, this lineup marked IBM's second wave of personal computers, succeeding the original IBM PC family, which was discontinued upon the PS/2 introduction. A majority of PS/2 units incorporated IBM's proprietary Micro Channel architecture (MCA) bus, an initiative aimed at reestablishing IBM's dominance in the PC sector. However, certain entry-level variants continued to utilize the broadly adopted ISA bus, an open architecture from earlier IBM PC models. The PS/2 portfolio encompassed various designs including desktops, tower configurations, integrated all-in-one systems, as well as portable and notebook computers.
Notes
- Legend
- Explanatory notes
- Models with IBM part numbers (P/N) designated for sales outside North America are omitted.
- Unless otherwise noted, built-in or optional displays are CRT monitors.
- The Space Saving Keyboard is a compact 87-key version of the Model M lacking a numeric keypad.
- The Model 25 Collegiate was tailored for university students, featuring dual 720 KB floppy drives, up to 640 KB of RAM, and bundled with the official PS/2 Mouse, Windows 2.0, along with blank floppy disks.
- Financial workstation versions included a specialized 50-key function keypad optimized for banking software.
- LS ("LAN Stations") models operated as diskless workstations without floppy or hard drives, connecting through Ethernet or Token Ring network adapters.
- Ultimedia editions came equipped with microphones, SCSI CD-ROM drives, M-Audio sound cards, volume controls, plus front-panel headphone and microphone jacks.
- Array models functioned as PS/2 Servers with support for RAID configurations.
Primary Series
| Model | IBM P/N | Processor | Clock Speed (MHz) |
Bus | Expansion Slots |
Drive Bays |
FDD | HDD | Default RAM |
Max RAM |
Video Adapter | Monitor | Form Factor | Launch Date | Remarks | Ref(s). |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 25 | 8525-001 | Intel 8086 | 8 (0 w) | ISA, 8-bit | 2 | 2 | one 720 KB | none | 512 KB | 640 KB | MCGA | 12-inch monochrome | All-in-one | Template:Date table sorting | Space Saving Keyboard included | |
| 25 SX | 8525-K00 | Intel 386SX | 20 | ISA, 16-bit | 3 | 2 | one 1.44 MB | none | 1 MB | 16 MB | VGA | 12-inch color | All-in-one | Template:Date table sorting | ||
| 30 286 | 8530-E31 | Intel 80286 | 10 (1 w) | ISA, 16-bit | 3 | 2 | one 1.44 MB | 30 MB (ESDI) | 512 KB | 4 MB | VGA | optional monitor available | Desktop | Template:Date table sorting |
(Note: The table has been streamlined by retaining representative models that highlight key business specifications such as CPU type, bus architecture, memory capacity, and chassis design.)
PS/2 Server
| Model | IBM P/N | CPU | Clock Rate (MHz) |
Bus Type | Expansion Slots | Drive Bays | Floppy Drive | Hard Drive | Default RAM | Maximum RAM | Graphics Adapter | Display | Chassis Type | Release Date | Remarks |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Server 85 | 9585-0X6 | Intel 486SX | 33 | 32-bit Micro Channel architecture (MCA) | 8 | 7 | single 2.88 MB | 104 MB (SCSI) | 8 MB | 64 MB | SVGA | optional | Tower | September 1992 | |
| Server 85 | 9585-0X9 | Intel 486SX | 33 | 32-bit MCA | 8 | 7 | single 2.88 MB | 160 MB (SCSI) | 8 MB | 64 MB | SVGA | optional | Tower | September 1992 | |
| Server 85 | 9585-0XA | Intel 486SX | 33 | 32-bit MCA | 8 | 7 | single 2.88 MB | 208 MB / 212 MB (SCSI) | 8 MB | 64 MB | SVGA | optional | Tower | September 1992 |
| Model | IBM P/N | Processor | Clock Speed (MHz) | Bus Architecture | Slots Available | Number of Drive Bays | Floppy Disk Drive | Hard Disk Capacity (SCSI) | Base Memory (RAM) | Maximum Memory (RAM) | Video Card | Monitor Option | Case Style | Launch Date | Additional Information |
|---|
| Model | IBM P/N | Processor | MHz | Bus | Expansion Slots | Drive Bays | FDD | HDD Capacity (SCSI) | Stock RAM | Max RAM | Video Adapter | Monitor Availability | Form Factor | Introduction Date | Notes |
|---|
| Model | IBM P/N | CPU Type | Clock Frequency (MHz) | Bus Type | Slots Count | Drives Count | Floppy Disk Drive | HDD Size (SCSI) | Initial RAM | Max RAM Supported | Graphics Adapter | Monitor Included? | Chassis Form Factor | Release Month/Year | Remarks |
|---|
| Model | IBM P/N | Processor | Speed MHz | Bus Architecture | Slots Count | Drive Bays | Floppy Drives | HDD Capacity (SCSI) | Standard RAM | Maximum RAM | Graphics Card | Monitor Option | Enclosure Type | Release Date | Comments |
|---|
| Model | ! IBM P/N | ! CPU | ! MHz | ! Bus Interface | ! Slot Number | ! Bay Number | ! FDD | ! HDD Capacity (SCSI) | ! Base RAM | ! Max RAM | ! Video Adapter | ! Monitor Availability | ! Form Factor | ! Date Released | ! Notes |
|---|
| Model ----- IBM P/N ----- Processor ----- Clock Speed ----- Bus Type ----- Expansion Slots ----- Drive Bays ----- Floppy Drives ----- HDD Capacity ----- Default RAM ----- Max RAM ----- Video Adapter ----- Monitor Option ----- Form Factor ----- Launch Date ----- Notes |
|---|
| Model | IBM P/N | Processor | Speed MHz | Bus | Slots | Drives | FDD | HDD capacity | Base RAM | Max RAM |
Video Adapter !! Monitor !! Form Factor !! Date Introduced !! Notes |
|---|
Portables
| Model | IBM P/N | CPU | Clock Frequency (MHz) |
Bus Type | Number of slots |
Number of drive bays |
FDD | HDD | Base RAM |
Maximum RAM |
Video Adapter | Display | Form Factor | Release Date | Remarks |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P70 | 8573-031 | Intel 386 | 16 | MCA, 32-bit | 2 (one 16-bit, one 32-bit) | 0 | one 1.44 MB | 30 MB (ESDI) | 2 MB | 8 MB | VGA | Monochrome gas plasma | Portable | Template:Date table sorting | Features slot for optional i387 math co-processor |
| P70 | 8573-061 | Intel 386 | 20 | MCA, 32-bit | 2 (one 16-bit, one 32-bit) | 0 | one 1.44 MB | 60 MB (ESDI) | 2 MB | 8 MB | VGA | Monochrome gas plasma | Portable | Template:Date table sorting | Equipped with slot for optional i387 math co-processor |
| P70 | 8573-121 | Intel 386 | 20 | MCA, 32-bit | 2 (one 16-bit, one 32-bit) | 0 | one 1.44 MB | 120 MB (ESDI) | 2 MB | 8 MB | VGA | Monochrome gas plasma | Portable | Template:Date table sorting | Contains slot for optional i387 math co-processor |
| P75 | 8573-161 | Intel 486 | 33 | MCA, 32-bit | 4 (two 16-bit, two 32-bit) | 0 | one 1.44 MB | 160 MB (SCSI) | 4 MB | 16 MB | VGA | Monochrome gas plasma | Portable | Template:Date table sorting | 'SCSI controller integrated on planar board' |
| Model | IBM "P/N" | Processor | Clock Speed (MHz) |
Bus Interface | Slot Count | Drive Bays Count | FDD | HDD Capacity | Standard RAM | Max RAM Capacity | Graphics Adapter | Screen Type | Device Type | Launch Date | Additional Information |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
8573-401 |
33 |
style="background:#CCF" | MCA, 32-bit |
4 (two 16-bit, two 32-bit) |
0 |
one 1.44 MB |
400 MB (SCSI) |
4 MB |
16 MB |
Monochrome gas plasma |
Portable |
'SCSI controller embedded on planar board' | ||||
|
8543-A44 |
20 |
style="background:#CFC" | ISA,16-bit |
0 (one with AT bus expansion port) |
0 |
one1.44MB |
60MB (IDE) |
2MB |
18MB |
Monochrome LCD |
Laptop |
|||||
|
8551-033 |
16 |
style="background:#FFC" | Proprietary |
2 (PC Card) |
unknown |
one1.44MB |
40MB (IDE) |
2MB |
10MB |
Monochrome LCD |
Notebook |
unknown | ||||
|
8551-025 |
16 |
style="background:#FFC" | Proprietary |
2 (PC Card) |
unknown |
one1.44MB |
80MB (IDE) |
2MB |
10MB |
Monochrome LCD |
Notebook |
unknown | ||||
|
8533-A33 |
16 |
style="background:#FFC" | Proprietary |
2 (PC Card) |
unknown |
one1.44MB |
40MB (IDE) |
unknown |
unknown |
unknown |
Monochrome LCD |
Notebook |
unknown | |||
|
8533-A35 |
16 |
style="background:#FFC" | Proprietary |
2 (PC Card) |
unknown |
one1.44MB |
80MB (IDE) |
unknown |
unknown |
unknown |
Monochrome LCD |
Notebook |
unknown | |||
|
8554-045 |
16 |
style="background:#FFC" | Proprietary |
2 (PC Card) |
unknown |
one1.44MB |
80MB (IDE) |
2MB |
16MB |
Color TFT |
Laptop |
unknown |
Associated Systems
... [similar Academic System entries omitted for brevity] ...| Model | IBM P/N | CPU | Clock Rate (MHz) |
Bus Type | Number of slots |
Drive Bay Count | FDD | HDD | Base RAM |
Maximum RAM |
Graphics Adapter | Display | Chassis Type | Launch Date | Remarks |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Academic System | 6152-022 | Intel 80286 ROMP 032 |
10 (286) | MCA, 16-bit | 8 | 4 | single 1.44 MB | 20 MB (ST-506) | 2 MB | 8 MB | VGA | optional | Tower | Template:Date table sorting | ROMP CPU on daughterboard; incompatible for simultaneous operation with 286 |
| Academic System | 6152-024 | Intel 80286 ROMP 032 |
10 (286) | MCA, 16-bit | 8 | 4 | single 1.44 MB | 20 MB (ST-506) | 4 MB | 8 MB | VGA | optional | Tower | Template:Date table sorting | ROMP CPU on daughterboard; incompatible for simultaneous operation with 286 |
| Academic System | 6152-044 | Intel 80286 ROMP 032 |
10 (286) | MCA, 16-bit | 8 | 4 | single 1.44 MB | 44 MB (ST-506) | 4 MB | 8 MB | VGA | optional | Tower | Template:Date table sorting | ROMP CPU on daughterboard; incompatible for simultaneous operation with 286 |
| Academic System | 6152-048 | Intel 80286 ROMP 032 |
10 (286) | MCA, 16-bit | 8 | 4 | single 1.44 MB | 44 MB (ST-506) | 8 MB | 8 MB | VGA | optional | Tower | Template:Date table sorting | ROMP CPU on daughterboard; incompatible for simultaneous operation with 286 |
| Model | IBM P/N | Processor | Clock Speed (MHz) | Bus Architecture | Slot Count | Drive Bays | Floppy Drives | Hard Drives | Default RAM | Max RAM Capacity | Video Card | Screen Type | Case Style | Release Date | -
... |
|---|
7690 Intel 8086 8 (zero wait states) ISA, 8-bit 4 0 single 1.44 MB none 640 KB 8 MB Multi-Color Graphics Array (MCGA) Monochrome LCD Mobile workstation Template:Date table sorting Custom mobile workstation based on Model 25 motherboard and Model30 firmware tailored for healthcare; designed to work alongside IBM Executive Workstation (7496) 9603 IBM386SLC 25 ISA,16-bit 4 2 single1.44MB 30MB IDE 1–4MB 20MB Super VGA (SVGA) 14-inch color display All-in-one design Template:Date table sorting Modified Model25 targeting education sector, includes optional sound card; later versions lack IBM logo badge 9604 Intel486SX 25 ISA,16-bit 4 2 single1.44MB 30MB IDE 4MB 20MB SVGA 14-inch color display All-in-one design Template:Date table sorting EduQuest Thirty-cs (9606) EduQuest Fifty-cs (9608) EduQuest Thirty-five (9613) EduQuest Fifty-five (9615) EduQuest Forty-five (9614) IBM Executive Workstation (7496) GE Fanuc Workmaster II (7186) Industrial Computer Series (7552/7541/7542/7561/7562/7546/7568 series) Personal Typing System Series (6901-001 to -006 and Typing System/2 variants)