The much-loved z/VM CMS 1 editor (strictly it’s the name of the CMS command used to call up the editor). Different enough from the ISPF/PDF editor to be truly annoying to visitors from z/OS.

The IBM supplied text editor used for full screen editing under CMS. We no longer have CMS, but we do have the (The Hessling Editor), an XEDIT clone for UNIX, on all the ACCC UNIX workstations, and we have KEDIT on all our public personal computers.

the predominant editor under CMS on IBM mainframes

Xekong Xel'Naga