What's new in the lab.

Every release of the Mainframe101 simulator, in plain language. New tracks, new features, and the fixes you'll notice.

v1.0.0

31 July 2026

Private beta

The first release of the Mainframe101 lab: a complete, guided path through the mainframe, in the browser.

Added

Nine guided tracks inside ZedBank, from your first command through JCL, COBOL, DB2, CICS, RACF and REXX.
Zed, the built-in tutor, explaining what's happening and why before showing you how.
A full terminal workbench in the browser: datasets, the editor, live jobs, and the spool.
Saved progress across every lesson, track, and job, so you can pick up where you left off.
OpenBadge credentials and certificates you earn and keep.
Voice mode, so lessons can be read aloud at your own pace.

More lands through the private beta. Join the waitlist and we'll tell you what's new.