Basic Operating System

operating system (BOS) An early [when?] IBM operatingsystem.

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)