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APL is A Programming Language, derived from a mathematical notation developed at Harvard in the 1950s and published in a book of the same name by [wiki:Kenneth_E._Iverson Kenneth E. Iverson].

It is distinguished by

extreme terseness
defining its primitives over arrays
the use of [:SpecialCharacters:special glyphs] to denote its primitive functions
extensive use of higher-order functions

The original APL\1130 spawned [:AboutApl/AplsAndRelatedLanguages many APLs and related languages]. It has also exercised a strong influence on [wiki:WikiPedia/Functional_Programming functional programming].

Other sources

[wiki:WikiPedia/APL_programming_language Wikipedia article on APL]
[http://home.earthlink.net/~swsirlin/apl.faq.html Sam Sirlin's APL FAQ]
[http://elliscave.com/APL_J/tool.pdf Notation as a Tool of Thought] K.E. Iverson's 1979 Turing Award lecture (see also ClassicPapers)
AplHistory

CategoryAboutApl

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-The original APL\1130 spawned [:/AplsAndRelatedLanguages many APLs and related languages]. It has also exercised a strong influence on [wiki:WikiPedia/Functional_Programming functional programming].
+The original APL\1130 spawned [:AboutApl/AplsAndRelatedLanguages many APLs and related languages]. It has also exercised a strong influence on [wiki:WikiPedia/Functional_Programming functional programming].