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GNU APL is a free and (almost) complete implementation of Extended APL as specified in ISO/IEC 13751:2001 and is thus similar to APL2. It runs on GNU/Linux and on Windows using Cygwin, and uses Unicode internally. GNU APL was written and is being maintained by GNU APL community.

GNU APL interpreter includes:

  • nested arrays and related functions
  • complex numbers, and
  • a shared variable interface

In addition, GNU APL can be scripted.

Richard Stallman, founder of the GNU Project, had been an early adopter of APL, using it to write a text editor as a high school student in the summer of 1969.

As of recently, there is an (experimental) online version of GNU APL.

External links

APL dialects [edit]
Maintained APL+Win (APL*PLUS) ∙ APL2APL64APL\ivCo-dfnsDyalog APLdzaima/APLGNU APLNARS2000ngn/apl
Historical Iverson notationA Programming LanguageA+ (A) ∙ APL#APL.68000APL.SVAPLXAPL\1130APL\360NARSopenAPLRowanSHARP APL (SAX) ∙ VisualAPL (APLNext) ∙ VSAPLYork APL
Derivatives ELIJK (Q, KDB+) ∙ LYaPASNialRAD