- Legacy Common Lisp implementations - Commercial Common Lisp implementations that are no longer actively developed:
- Small Lisp - Small Lisp is a historic Lisp dialect that was used for the example code in RD Cameron and AH Dixon's Symbolic Computing with Lisp
- XLisp - XLisp is the name for several historic Lisp dialects developed by David Betz that was popular for small microcomputers in the 1980s and 1990s
Topic about Lisp-related things running on MS-DOS and related operating systems. Mostly of interest for software archaeology and retrocomputing (see also historic Lisp dialect).