REXX Tips & Tricks:REXX & OS/2 online help
From EDM2
View the REXX online help
Note for Users of Object-Oriented REXX (with or without Merlin):
Depending on your default REXX Interpreter the file REXX.INF is either the file REXX.INF from the Classic REXX or the file OREXX.INF from Object-Oriented REXX If Object-Oriented REXX is the default REXX interpreter, the online help for Classic REXX is called CREXX.INF; if Classic REXX is the default REXX interpreter; the online help for Object-Oriented REXX is OREXX.INF.
(Thanks to Richard K. Goran for this information)
View the OS/2 command reference