Programming Language - MDL

MDL

MDL - (originally "Muddle"). C. Reeve, C. Hewitt & G. Sussman, Dynamic
Modeling Group, MIT ca. 1971. Intended as a successor to Lisp, and a
possible base for Planner-70. Basically LISP 1.5 with data types and
arrays. Many of its features were advanced at the time (I/O, interrupt
handling and coroutining), and were incorporated into later LISP dialects
("optional", "rest" and "aux" markers). In the mid 80s there was an
effort to use bytecoding to make the language portable. CLU was first
implemented in MDL. Infocom wrote Zork in MDL, and used it as the basis
for the ZIL interpreter. "The MDL Programming Language", S.W. Galley et
al, Doc SYS.11.01, Project MAC, MIT (Nov 1975). Implementations exist for
ITS, TOPS-20, BSD 4.3, Apollo Domain, SunOS and A/UX.

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