DOS/360 and successors
IBM mainframe operating system designed for use with smaller machines / From Wikipedia, the free encyclopedia
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This article is about the family of operating systems for IBM System/360 computers. For other uses, see DOS (disambiguation).
Disk Operating System/360, also DOS/360, or simply DOS, is the discontinued first member of a sequence of operating systems for IBM System/360, System/370 and later mainframes. It was announced by IBM on the last day of 1964, and it was first delivered in June 1966.[1] In its time, DOS/360 was the most widely used operating system in the world.[2]