Definition: REXX

(REstructured EXtended eXecutor) An IBM mainframe structured programming language that runs under VM/CMS and MVS/TSO. It can be used as a general-purpose macro language that sends commands to application programs and to the operating systems. REXX was also included in OS/2 Version 2.0. The following REXX example converts Fahrenheit to Celsius:

 Say "Enter Fahrenheit "
 Pull FAHR
 Say "Celsius is " (FAHR-32) * (5 / 9)