Procyon Common Lisp

A Common Lisp system that is notable for having the first commercially available CLOS implementation, it was developed by British company Procyon Research Ltd. in the latter half of the 80's. It ran under DOS on computers with a 386 processors or higher, was ported to OS/2 in 1988 with an Apple Macintosh version showing up a year later, and a Microsoft Windows version around the turn of the decade.

The product line was apparently not profitable and was sold to Scientia Ltd. in 1991 but they had been selling classroom scheduling software written in Procyon Lisp for a couple of years, the rights to the Windows version were sold to Franz Inc. in mid 1992 for US$ 275k who renamed the product Allegro CL\PC and have been developing it ever since, but Scientia continued selling the Mac, DOS and OS/2 versions for a few years afterward.

Publications

Richard Barber: CLOS - A Perspective: The Common Lisp Object System - In PDF format
Richard Barber & George Imlah: Delivering the Goods with Lisp. Communications of the ACM 34(9); pages 61-63 - 1991

Licence

Discontinued commercial software, original RRP was US$1500 in 1989.

Author & publishers