1. Extensible Shell. A Unix shell written by Byron Rakitzis <byron@netapp.com> and Paul Haahr <haahr@adobe.com>, derived from rc. Es has real functions, closures, exceptions and the ability to redefine most internal shell operations.
Version 0.84. FTP.
["Es - A Shell with Higher Order Functions", P. Haahr et al, Proc Winter 1993 Usenix Technical Conference].
(30 Apr 1993)
2. Expert System. An expert system for the IBM PC. It features forward chaining, backward chaining and fuzzy set relations.
[BYTE Oct 1990].