The program was written originally by

Lars Pensj|, April 1989 (lars@cd.chalmers.se).

Other credits:

The regexp package was made by Henry Spencer.

The ed package was not done by me. See the file ed.c for information.

Bit manipulations was implemented by pell@lysator.liu.se who also found
several bugs that had eluded me for months.

Valuable help and hints from: Mark Nagel, James Seidman, Moonchilde and more.

Roland Dunkerley III fixed for-loops, do-while and the operators ++ and --.

Sean T Barrett made smalloc.c.

Lennart Augustsson convinced me to implement a compiler for a virtual
stack machine. He also implemented the built-in preprocessor.

John S. Price found and fixed many bugs.

The shadow idea was "forwarded" to me by John S. Price from Team Cthulhu
(Bill Burdick, Roy Riggs, Mitch Adler).

Michael Malone, Michael O'Reilly, Klaus Rennecke, J|rn Rennecke and
Germano Caronni found and fixed a large amount of bugs.

Petri Wessman fixed changes for SCO unix and AIX.