DOS/360 And Successors
TOS/360 (Tape Operating System/360) was an IBM operating system for the System/360, used in the early days around 1965 to support the IBM 360 model 30 and similar platforms. TOS was a predecessor to IBM's DOS/360.
TOS died out quickly as disks such as the IBM 2311 and IBM 2314 became common with the System/360, whereas they had been an expensive luxury on the IBM 7090.
Read more about DOS/360 And Successors: History, Hardware Requirements, Technical Details, Job Control
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“Of one thing I can assure you with comparative certainty, whoever wins, Europe will be economically ruined. This war is America’s great opportunity.”
—John Dos Passos (1896–1970)