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IBM 360 Operating Systems Release History
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OS/360 (source Lehman, "Program Evolution, Processes of Software Change" pg. 45)
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Release 1 PCP Pre-release in 11/??/1965
Announce: 12/??/1965
Availability: 03/31/1966 14 components, 1152 modules, 400359 source statements
Release 2
Availability: 06/66 14 components
Release 4/5
Announce: 08/18/1966
Availability: 08/66 17 components
Release 6 MFT
Announce: 04/29/1966
Availability: 10/66 19 components
Release 8
Announce:
Availability: 12/07/1966 22 components
Release 9.5
Availability 02/1967 29 components
Release 11
Availability: 05/67 34 components
Release 12 MVT?, source resequenced
Announce:
Availability: 08/08/1967
Release 13 MVT
Announce:
Availability: 08/??/1967
Manuals: 09/1967
Release 14
Availability 01/1968 35 components
Release 15/16 MFT-II, VTOC positioning
Announce:
Availability: 08/30/1968 40 components, 3819 modules, 1740364 source statements (r16)
Manuals: 05/1968
Release 17
Announce:
Availability: 03/1969 44 components
Manuals: 11/1968
Release 18.0 SMF for MVT
Announce: 07/??/1969
Availability: 09/1969 >48 components
Manuals: 11/1969
Release 18.6
Announce: 10/??/1969
Availability:
Release 19.0
Availability: 03/1970 >50 components
Manuals: 06/1970
Release 19.1 SMF for MFT, MFT Attach, 1285/87/88 support
Announce: 06/01/1970
Availability: 08/05/1970
Release 19.6 Update (PTF) release
Announce: 08/05/1970
Availability:
Release 20.0 TSO
Availability: 09/1970 >53 components
Manuals: 01/1971
Release 20.1
Announce: 02/??/1971
Availability:
Manuals: 03/1971, 06/1971
Release 20.6 Update (PTF) release
Announce:
Availability:
Manuals: 09/1971
Release 21.0
Announce:
Availability:
Manuals: 03/1972
Release 21.6
Manuals:
Release 21.7
Manuals: 04/1973
Release 21.8
Announce: 08/??/1972
Availability:
Manuals: 08/1974
DOS/360
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Release 6
Announce:
Availability: 12/7/1966
Release 20
Manuals: 04/1969
Release 21
Manuals: 11/1969
Release 24
Manuals: 10/1970
Release 28 DOS/VS, CRT console (360/125), IBM Boeblingen
Announce: 1973
Availability:
Release 29 VSAM, 3340 support
Announce: 1974
Availability:
BOS/360
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Release 17
Manuals: 07/1968