Basically all the early ones were Lisp companies: * Symbolics, Lisp Machines * BBN, Jericho Lisp Machine running Interlisp, lot's of applied AI stuff - BBN al

Basically all the early ones were Lisp companies: * Symbolics, Lisp Machines * BBN, Jericho Lisp Machine running Interlisp, lot's of applied AI stuff - BBN also did a lot of other things * Thinking Machines, Lisp on the Connection Machine MCC, Research Center with a hundred Lisp Machines used for research in AI (Cyc), chip design, object oriented databases (ORION), ... * Xerox: Lisp Machine * SRI: AI research