tape operating system การใช้

• TOS ( Tape Operating System ), as the name suggests, required a tape drive.
• IBM introduced a series of stop-gaps to prevent System / 360 hardware sales from collapsing & mdash; first BOS / 360 ( Basic Operating System, for the smallest machines with 8K byte memories ), then TOS / 360 ( Tape Operating System, for machines with at least 16K byte memories and only tape drives ), and finally DOS / 360 ( Disk Operating System ), which became a mainstream operating system and is the ancestor of today's widely used z / VSE.