Other resources IBM Alternate Library for REXX on zSeries Version 1.4.0 for use with z/OS Learn how to install the Alternate Library in a fast and easy way. Vendors who distribute REXX compiled code may want to add this package to their installation. Read the documentation IBM Alternate Library for REXX on zSeries Version 1.4.0 for use with z/VM Learn how to install the Alternate Library in a fast and easy way. Vendors who distribute REXX compiled code may want to add this package to their installation. Read the documentation Abstract for IBM Compiler and Library for REXX on zSeries (IBM Z) Learn how to compile and run programs written in the Restructured EXtended eXecutor (REXX) language. Read the documentation Enabling REXX in CICS Customization information and more. Read the documentation REXX/CICS commands Get detailed reference information for all REXX/CICS commands. Read the documentation Basic structure of REXX running under CICS Get details on the various ways Exec is started using REXX on CICS. Read the documentation Expert resources to help you succeed IBM Knowledge Center Get information about how to maintain and use the product. Resource library Explore a collection of in-depth information for this product.