abstract:The Dipmeter Advisor was an early expert system developed in the 1980s by Schlumberger with the help of artificial-intelligence workers at MIT to aid in the analysis of data gathered during oil exploration. The Advisor was generally not merely an inference engine and a knowledge base of ~90 rules, but generally was a full-fledged workstation, running on one of Xerox's 1100 Dolphin Lisp machines (or in general on Xerox's "1100 Series Scientific Information Processors" line) and written in INTERLISP-D, with a pattern recognition layer which in turn fed a GUI menu-driven interface.