IBM mainframes
Following are the mainframe architectures used in IBM mainframes since the original System/360 introduced in 1964.
Year Architecture Model numbers
System/360
1964 System/360 2xxx (2020 to 2195)
System/370
1970 System/370 3xxx (3115 to 3168)
1977 System/370 303x (3031, 3032, 3033)
1979 System/370 43xx series
1980 System/370 308x series (3081, 3083, 3084)
1981 XA/370 308x series (3081, 3083, 3084)
1986 XA/370 3090 series (120 to 600)
1986 XA/370 9370 series
1988 ESA/370 ES/3090 and ES/4381
System/390
1990 ESA/390 ES/9000, 120 to 9X2
1994 ESA/390 9672 Exx & Pxx, G1
Parallel Transaction Server
1994 ESA/390 9672 Rx1, G1
Parallel Enterprise Server
1995 ESA/390 9672 Rx2,Rx3, G2
1996 ESA/390 Multiprise 2000 (2003-xxx)
1996 ESA/390 9672 Rx4, G3
1997 ESA/390 9672 Rx5, G4
1998 ESA/390 9672 Rx6-Yx6, G5
1998 ESA/390 9672 Y56-YX6, G5 Turbo
1999 ESA/390 9672 X17-XZ7, Z17-ZZ7, G6
1999 ESA/390 7060-xxx Multiprise 3000, G5
zSeries
2000 z/Architecture 2064 100-116, 1C1-1C9, z900
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| An IBM Mainframe Installation |
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| Contrary to public opinion, mainframes are hardly extinct. Organizations have huge investments in mainframe programming, and there are numerous applications where a centralized solution is the most efficient and secure. (Image courtesy of International Business Machines Corporation. Unauthorized use not permitted.) |