CBTTAPE.ORG
More updates to the site coming soon! I hope to see everyone at SHARE Orlando, Florida, Feb 2026.
- ALWAYS CHECK HERE FOR THE LATEST VERSIONS OF FILES: All file updates are ONLY applied to the UPDATES page until a new tape version is cut. Please check the UPDATES page to see if your FILE NUMBER has been updated since the last "Version Cut" of the CBT Tape. If your file number is NOT on UPDATES, ONLY THEN should you download it from the CBT subdirectory. Don't download a back-level file unnecessarily.
- See the account of How We Got The High-Level Assembler.
- CBT509 is available to download now!
- COV466 is available to download now!
- The latest CBT and COV Updates are always available to download here!
- If you arrived here from another site, please note: NO USERID, PASSWORD, or MEMBERSHIP is required to use this site. To get into this site directly, just click: https://www.cbttape.org
- Sam Golob's Articles about Systems Programming available to download here. Over 230 articles on relevant aspects of the craft.
- CBT and COV available to download in FDR and DFSMSdss formats updated for CBT509.
- Raw AWS versions of CBT509 and COV466 are available in the AWS tape library.
"If sharing a thing in no way diminishes it, it is not rightly owned if it is not shared." — attributed to St. Augustine
You can Download CBT or Download Overflow tape material.
You can find out here how to contribute to the tape.
Everything on this site is subject to a disclaimer.
If you have any suggestions or problems with the site please send email to Sam Knutson.
Send email about the CBT tape in general to Sam Golob.