Time Sharing Option A subsystem of an IBM MVS operating system TSO allows multiple users to concurrently use the mainframe facilities and services TSO is bundled with MVS
Time Sharing Option: An interactive system that the ACCC used to run under MVS on its IBM 3090 mainframe
Name originally given to IBM's compatible extension of MVS background facilities into foreground execution The name has stuck, though TSO is no longer an MVS "option "
Technical Standard Order A technical standard that all American parachutes must meet before they can be marketed Unless specifically exempted by the FAA, a parachute must have a TSO placard to be legal
Technical Standard Order, performance specification and production compliance document issued by FAA
Terminal Sharing Option A terminal-oriented, interactive, menu-driven facility of the MVS operating system, providing utilities and other operator-initiated functions