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Definition: LISP machine

A high-end workstation used to execute applications written in the LISP programming language. Typically with keyboards customized for LISP commands, machines from Symbolics, Lisp Machines Inc., TI and Xerox were introduced in the 1980s. See LISP.

A Dedicated LISP Machine
Running the Geneva OS, this Symbolics 3640 LISP machine, which debuted in 1983, was on display in 2001 at the Vintage Computer Festival East in Marlborough, Mass. (Image courtesy of Michael L. Umbricht and Carl R. Friend, Retro-Computing Society of RI, Inc., www.creativecommons.org/licenses/by-sa/3.0/legalcode)