Interlisp
A Lisp dialect developed at Xerox PARC, widely used in early AI research and expert systems development during the 1970s–80s.
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Commercial Lisp Machine Market: Symbolics and LMI
From 1980 onwards, Symbolics Inc. and Lisp Machines Inc. (LMI), both founded as spin-offs from the MIT Artificial Intelligence Laboratory, commercialised dedicated hardware workstations designed to run Lisp natively, offering large address spaces, garbage collection in hardware, and early graphical interfaces tailored to AI development.