Knowledgebase for Systemprogrammers, including topics OS/390, LE/370, RACF, SMS, WLM and many more.

VSE-L, discussion land and resources for the VSE / ESA operating system! VSE & VM Vendor & Product index. Links to Code, User Groups, Humor, Jobs, Languages/Apps, Year 2000 and more.

The on-line home of the CBT tape collections of z/OS Freeware. Lots of tools for the S/390 programmer or system doctor!

 CBTTAPE.ORG is really the best site for z/OS utilities; surely worth a visit if you really don't know it yet !

Welcome to my website which I've dedicated to making available to the 'world' software that I've written over the years. Here you will find XMITIP, the OS/390 and z/OS E-Mail application (on the TCP/IP Tools page) and many other tools for OS/390 and z/OS. These tools are primarily written in REXX with a few Assembler programs.
My name is Lionel B. Dyck and I've been in systems programming since 1972 (starting with MVT 21.6 - remember IBM APARs delivered on punch cards) and have developed a number of tools over the years. I've created this site to (1) share useful code that I've developed and (2) to return a little back to the community of mainframe systems programmers from whom I've learned so much. I've gleaned code and knowledge from the MVT Tools Tapes (remember the Blue Berets?) to the current CBT Tape and a wealth of Web Sites. I hope my contributions here are helpful to others.