This is a simple line editor, similar to UNIX ed(1). I wrote this back in the early 1980’s(!) based on the editor in the books Software Tools and Software Tools in Pascal.
It contains no AT&T/Weco/USL/Univell/Novell/SCO/Caldera source code.
Geoff Collyer typed it in again in 1994, from some listings of mine dated 1983, after the online source got lost in the sands of time. Geoff also found a few bugs and suggested improvements to the decade-old code he started with - Thanks Geoff!
The source is still in flux and needs work - see TODO. This is not something you would use in production at the present time.
Ian Darwin, Toronto.