System/360 Key dates*
Model Announced First Shipped Withdrawn
20 (5) November 18, 1964 April 1966 n/a
22 April 7, 1971 June 1971 October 7, 1977
25 January 3, 1968 October 1968 October 7, 1977
30 April 7, 1964 June 1965 June 22, 1970
40 April 7, 1964 April 1965 October 7, 1977
44 August 16, 1965 June 1966 September 24, 1973
50 April 7, 1964 August 1965 March 15, 1977
60 April 7, 1964 Not Shipped (1) April 22, 1965
62 April 7, 1964 Not Shipped (1) April 22, 1965
65 April 22, 1965 November 1965 March 15, 1977
67 August 16, 1965 May 1966 March 15, 1977
70 April 7, 1964 Not Shipped (2) April 22, 1965
75 April 22, 1965 January 1966 March 15, 1977
85 January 30, 1968 December 1969 June 24, 1971
91 January 18, 1966 October 1967 February 20, 1967
92 August 17, 1964 Not Shipped (3) n/a
95 (4) February 1968 n/a
195 August 20, 1969 March 1971 February 9, 1977

(1)  Replaced by Model 65.
(2)  Replaced by Model 75.
(3)  Redesignated as Model 91.
(4)  Offered on special government contract.
(5)  Model 20 architecture differed in some respects from other S/360 models.
n/a  Not available.
* Sources: A. Pedegs, "System/360 And Beyond," IBM Journal Of Research And Development, Vol. 25, No. 5, September 1981, Table 2, p. 387; various data on file in IBM Corporate Archives.

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