Tape Operating System

operating system (TOS) An IBM operating system for

System 360, used in the early days around 1965 to support

the IBM 360 model 30 et al. TOS was a predecessor to IBM's

Disk Operating System.

TOS died out really early as disks such as the 2311 and 2314

became common with the IBM 360 whereas thet had been a real

luxury on the IBM 7090.

[Relationship to BOS?]

(1999-01-20)