A Programming Language

computer programming language that was developed in the 1960s and is usually used to generate matrixed data (based on loops instructions, used in mainframes and smaller computers)

For information on the A+ computer certification program, see CompTIA. A+ is an array programming language, a dialect of APL with aggressive extensions.  Arthur Whitney developed the "A" portion of A+, while other developers at Morgan Stanley extended it, adding a graphical user interface and other language features. A+ was designed for numerically intensive applications, especially those found in financial applications. A+ runs on many Unix variants, including Linux. A+ is a high-level, interactive, interpreted language.
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APL (A Programming Language) is an array programming language based on a notation invented in 1957 by Kenneth E. Iverson while at Harvard University. It originated as an attempt to provide consistent notation for the teaching and analysis of topics related to the application of computers. Iverson published his notation in 1962 in a book titled A Programming Language, and APL got its name from the title of this book. In 1964, a subset of the notation was implemented as a programming language. Iverson received the Turing Award in 1979 for his work.
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<language> (APL) A language designed originally by Ken Iverson at Harvard University in 1957-1960 as a notation for the concise expression of mathematical algorithms. It went unnamed (or just called Iverson's Language) and unimplemented for many years. Finally a subset, APL\360, was implemented in 1964.
APL is an interactive array-oriented language and programming environment with many innovative features. It was originally written using a non-standard character set.
It is dynamically typed with dynamic scope. APL introduced several functional forms but is not purely functional.
Dyadic Systems APL/W is one of the languages that will be available under Microsoft's .NET initative.
ISO 8485 is the 1989 standard defining the language.
Versions: APL\360, APL SV, Dyalog APL, VS APL, Sharp APL, Sharp APL/PC, APL*PLUS, APL*PLUS/PC, APL*PLUS/PC II, MCM APL, Honeyapple, DEC APL, Cognos APL2000, IBM APL2.
See also Kamin's interpreters.
APLWEB translates WEB to APL.
Dijkstra said that APL was a language designed to perfection - in the wrong direction.
["A Programming Language", Kenneth E. Iverson, Wiley, 1962].
["APL: An Interactive Approach", 1976].
(2004-02-13)