Lisp Machine MIT Lisp Machine 1. <architecture> Any {machine} (whether notional or actual) whose instruction set is {Lisp}. 2. <hardware, operating system> A line of {workstations} made by {Symbolics, Inc.} from the mid-1970s (having grown out of the {MIT AI Lab}) to late 1980s. All system code for Symbolics Lisp Machines was written in {Lisp Machine Lisp}. Symbolics Lisp Machines were also notable for having had {space-cadet keyboards}. [More details and historical background?] Lisp Machine Museum (http://kogs-www.informatik.uni-hamburg.de/~moeller/symbolics-info/symbolics.html). (2003-07-03)