Any machine (whether notional or actual)
whose instruction set is Lisp.
2. 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)
Source: The Free On-line Dictionary of Computing (27 SEP 03)