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J
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A derivative and redesign of APL with added features and
control structures. J is purely functional with lexicalscope and more conventional control structures, plus several
new concepts such as function rank and function arrays. J
was designed and developed by Kennneth E. Iverson and Roger
Hui hui@yrloc.ipsa.reuter.com. J uses only the ASCII
character set but has a spelling scheme that retains the
advantages of APL's special alphabet. J is a conventional
procedural programming language but can be used as a purelyfunctional language.
Version 4.1 for MS-DOS, Sun, Mac, Archimedes. Source
available in C from Iverson Software, +1 (416) 925 6096.