Time Sharing Option (TSO)

Time Sharing Option (TSO) is an interactive time-sharing environment for IBM mainframe operating systems, including OS/360 MVT, OS/VS2 (SVS), MVS, OS/390, and z/OS.

Wikipedia Contributors. “Time Sharing Option.” Wikipedia, Wikimedia Foundation, 7 July 2025, https://en.wikipedia.org/wiki/Time_Sharing_Option.