REXX for TSO is used in an environment more or less dedicated to system administrators and program developers. It is not generally used as a programming environment by end-users and so REXX tended to be used to make system utilities more user-friendly and as an application "wrapper" for end-users. REXX procedures that I wrote on VM have been successfully ported to the TSO environment - the REXX code remaining the same but system I/O calls being adapted for TSO.

The following publications are available for REXX on IBM mainframe systems: