The CLIST and REXX™ languages are the two command languages available from TSO/E. The CLIST language enables you to work more efficiently with TSO/E.

The CLIST language is an interpreted language. Like programs in other high-level interpreted languages, CLISTs are easy to write and test. You do not compile or link-edit them. To test a CLIST, you simply run it and correct any errors that might occur until the program runs without error.

The term CLIST (pronounced "see list") stands for command list; it is called this because the most basic CLISTs are lists of TSO/E commands. When you invoke such a CLIST, it issues the TSO/E commands in sequence.