A (Axiom)

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ParadigmMulti-paradigm: object-oriented, functional
Designed byRichard Dimick Jenks, Barry Trager, Stephen M. Watt, James Davenport, Robert Sutor, Scott Morrison
DeveloperThomas J. Watson Research Center
First appeared1971; 48 years ago (1971)
Stable release
Gold / November 2008; 10 years ago (2008-11)
Preview release
Silver / July 31, 2014; 5 years ago (2014-07-31)
PlatformCross-platform (16-32-64-bit): RS/6000, SPARC, Alpha, IA-32, Intel 286, Motorola 680x0, System/370
OSCross-platform: Linux, AIX, SunOS, HP-UX, NeXT, Mach, OS/2, DOS, Windows, VMS, VM/CMS
Filename extensions.as
Influenced by
Pascal, Haskell

A (pronounced: A sharp) is an object-oriented functional programming language distributed as a separable component of Version 2 of the Axiom computer algebra system. A# types and functions are first-class values and can be used freely together with an extensive library of data structures and other mathematical abstractions. A key design guideline for A# was suitability of compiling to portable and efficient machine code. It is distributed as free and open-source software under a BSD-like license.[1]

Development of A# has now changed to the programming language Aldor.

A# has both an optimising compiler, and an intermediate code interpreter. The compiler can emit any of:

The following C compilers are supported: GNU Compiler Collection (GCC), Xlc, Oracle Developer Studio, Borland, Metaware, and MIPS C.


  1. ^ "Frequently Asked Questions (FAQ)". Axiom: The Scientific Computation System. Retrieved 12 February 2017.

This article is based on material taken from A# at the Free On-line Dictionary of Computing prior to 1 November 2008 and incorporated under the "relicensing" terms of the GFDL, version 1.3 or later.