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    |
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   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   |
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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.

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