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# Products

J is a high-level, general purpose programming language. The J system provides: an engine for executing J; various front ends that provide user interfaces to the J engine; a library, written in J, that provides an IDE (interactive development environment), numerous tools, utililties, demos, tutorials; and online documention.
J Systems are available for Windows, Windows PocketPC, Macintosh, Linux, Solaris, AIX, FreeBSD, NetBSD, 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 is documented in 5 online html format books that are distributed with the system. These books, and others, are available in PDF format from the Jsoftware web site.
J is licensed for free installation on all platforms. You can download, redistribute, and run end user applications built with J for free.
You must have a J User License (JUL) to program in J.
You can download J from www.jsoftware.com.

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