Time Share Option (TSO) is an interactive
command line interpreter for
IBM mainframe operating systems such as
MVS/ESA,
OS/390 and
z/OS. It fills the same purpose as a command shell like
Bash on
Unix, or
cmd[?] on
Windows. TSO is normally used by mainframe
system administrators and programmers. For more information see the book
MVS TSO by
Doug Lowe[?].