MDL is a historical programming language created in 1971. MDL (the MIT Design Language) is a descendant of the Lisp programming language. Its initial purpose was to provide high level language support for the Dynamic Modeling Group at MIT's Project MAC. It was initially developed in 1971 on the PDP-10 computer under the Incompatible Timesharing System. Read more on Wikipedia...
- MDL ranks in the top 50% of languages
- the MDL wikipedia page
- MDL first appeared in 1971
- See also: scheme, common-lisp, java, prolog, smalltalk, simula
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Example code from Wikipedia:
<DEFINE EXIT-TO (EXITS RMS) #DECL ((EXITS) EXIT (RMS) <UVECTOR [REST ROOM]>) <MAPF <> <FUNCTION (E) #DECL ((E) <OR DIRECTION ROOM CEXIT NEXIT DOOR>) <COND (<TYPE? .E DIRECTION>) (<AND <TYPE? .E ROOM> <MEMQ .E .RMS>> <MAPLEAVE T>) (<AND <TYPE? .E CEXIT> <MEMQ <2 .E> .RMS>> <MAPLEAVE T>) (<AND <TYPE? .E DOOR> <OR <MEMQ <DROOM1 .E> .RMS> <MEMQ <DROOM2 .E> .RMS>>> <MAPLEAVE T>)>> .EXITS>>
Last updated November 6th, 2019