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PS/55 Timeline

The Multistation series had been rebranded to PS/55 in May 1987 and remained on the market together with the MCA-based PS/55 line.
The following diagram does not cover any Multistation machines to avoid confusion. See the IBM Multistation Timeline.

PS/55    |
|		    PS/55Z & Laptop
1987 MAY
      5570-S		 |
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1988 APR
      5570-T
     5550-S/T		 |
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|		  1988 NOV
  5530Z-286
1989 MAY
      5570-V0x
     5550-V0x		 |
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NOV
    5530-T		 |
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    5530Z-SX
1990 MAY
      5570-V1x
     5550-V1x
     5545-T		 |
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OCT
       5580-Y
    5560-W
       5540-T
     5535-S
      5530-T		 |
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1991 MAR |
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  5523-S
MAY
    5550-V2		 |
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     5510-T
     5510-Z
OCT
      5580-W		 |
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   5530-U
 8551-S N51sx


 5523SX
     5510-S
1992 FEB
    5551-W		 |
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|		   5527-U
  (N27sx)
JUN
     95XP-486
   5530-W		 |
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   5530-U-SLC/V
SEP  
     5560-N		 |
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OCT |
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   9552-Y
 (C52 486SLC)
1993 JAN   |
|		 9552-J
 (TP720C)
APR
   5551-N/Y		 |
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   5530-V2
OCT
    Server 95A
        9585
   5551-L
 PS/55E
 5538-Y/Z		 |
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1994 APR  
    5551-R
   5521Y
    5530-L		 |
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Content created and/or collected by:
Louis F. Ohland, Peter H. Wendt, David L. Beem, William R. Walsh, Tatsuo Sunagawa, Tomáš Slavotínek, Jim Shorney, Tim N. Clarke, Kevin Bowling, and many others.

Ardent Tool of Capitalism is maintained by Tomáš Slavotínek.
Last update: 15 Jun 2025 - Changelog | About | Legal & Contact