Early LISP with a speedy interpreter based on Common Lisp and

Early LISP with a speedy interpreter based on Common Lisp and
Zetalisp, from the Symbolics workstations where Experlisp originated.
Speed is said to approach that of both Forth and 68000 assembly
language. It is lexically scoped (giving you local variables), and
includes Macintosh Toolbox access via nearly the same syntax as the
Pascal examples in Inside Macintosh. Maximum size of a Lisp function
is 250 KB.

ExperLisp has an editor, compiler, and an immediate-mode called the
Listener Window. Portions of text can be selected with the mouse and
compiled separately to test them. ExperLisp implements its own form of
virtual memory, swapping portions of a program into memory or out to
disk as needed. It also supports a variation of Logo's "turtle
graphics", which ExperLisp calls Bunny Graphics and can operate in
three dimensions.

The 1.0 release lacks the ability to create stand-alone applications,
so you must use the ExperLisp compiler or editor to run your programs.
It is also widely said to be remarkably buggy, and this remained true
for v1.5.

There was a v0.1 pre-release, in which MIN, MAX, nested CAR, and
nested CDR did not work. The pre-release version expires after a
certain date.

Also available for ExperLisp was Jean-Marie Hulot's InterfaceBuilder
(previously known as SOS Interface), which simplified the building of
user interfaces.

NOTE: Be sure to back up your LispENV file. If it becomes corrupted,
you can remove it and the ExperLisp Compiler will generate a new one
but some features will be missing, like fast versions of some Lisp
functions, access to the Macintosh Toolbox, and the Listener Window.

Other attested ExperTelligence software:
ExperLisp-Plus (full developer version)
ExperLisp-Talker
ExperOPS5-Plus (with graphics and dialog boxes)
ExperFacts
PrologII (developed by Marseilles University)
ExperLogo
ExperLisp 3600

DL #1 is version 1.0, with copy protection removed

Compatibility
Architecture: 68k

Macintosh 512 "Fat Mac", Macintosh XL, or higher.

Note that the Macintosh 128k does not have enough RAM to run
ExperLisp.