System/About J

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J is a general purpose programming language designed by Ken Iverson and Roger Hui. It is available on a wide variety of computers and operating systems. J is distinguished by its simple and consistent rules, a large set of built-in capabilities, powerful facilities for defining new operations, and a general and systematic treatment of arrays.

J Systems are available for Windows, macOS, Linux, IOS, Android, Raspberry Pi and others. The core language is identical in all versions, and programs not making use of platform-dependent features will work unchanged on all systems.

J Systems are developed and distributed by Jsoftware Inc. You can download, redistribute, and run end user applications built with J for free.


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