An expert system that used rules to configure computer orders automatically.
XCON was the calm nerd at a computer store. Tell it the order, and it picked the right parts without losing a cable.
Companies used it to build correct computer orders. It proved expert systems could make real money.
Expert System
XCON showed how an Expert System could work in real business.
Production
XCON used many if-then rules to build complex orders.
Symbolic AI
XCON turned expert know-how into rules a machine could run.
MYCIN
XCON and MYCIN are classic rule-driven expert systems.