Machines from Xerox running Interlisp-D. The computers had acronyms starting with D. Xerox later also integrated Common Lisp into Interlisp-D. The hardware was

Machines from Xerox running Interlisp-D. The computers had acronyms starting with D. Xerox later also integrated Common Lisp into Interlisp-D. The hardware was not powerful - for example they had very little RAM. But an emulator was developed for SPARC/UNIX and X86/Linux. Called Medley.