Basic Operating System
<operating system> (BOS) An early [when?] IBM operating system.
According to folklore, BOS was the predecessor to TOS on the IBM 360 and it was
IPL'd from a card reader. It may have been intended for very small 360's with no
disks and limited tape drives.
BOS died out really early [when?] as disks such as the 2311 and 2314 became
common with the IBM 360, whereas disks had been a real luxury on the IBM 7090.
(1999-01-29)
Nearby terms:
Basic Multilingual Plane « Basic Object Adapter «
Basic Object System « Basic Operating System
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