This tutorial is intended for os/2 users starting with OS/2 2.30 or 3.0 or WARP. It is probably applicable mutatis mutandis to other systems as well, since REXX exists on a variety of platforms.
Site with all kinds of (administrative) scripting related information and relevant links. Covering batch files, JScript, KiXtart, Perl, PowerShell, Rexx, VBScript