APL is a high-productivity computing tool which is concise, has a consistent mathematical foundation, is intrinsically an array processing language, and has been developed over a period of more than 30 years. It 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. Major APL users include financial institutions, insurance companies, engineers, scientists, mathematicians and teachers. Applications for which it is used range from pure mathematics through engineering calculations and on to free-form text retrieval.
Please consider very carefully if your submitted link would not be better in one of the subcategories.
This category holds links for books, paper or online, on the APL programming language, and very closely related issues.
Links to conference-related web sites and pages.
Please submite links relating to any APL conferences. This includes web pages with conference papers and/or photographs.
Links to websites and pages for individuals and companies providing APL consultancy and programming services.
Provides links to websites and pages for individuals and companies providing APL consultancy and programming services.
Interesting APL-related articles, web pages, etc., that are otherwise hard to classify.
Please submite APL-related articles, web pages, etc. that don''t fit into the other APL categories provided.
Web sites/pages for personal APL users.
Please provide links to web sites/pages for personal APL users that have interest to other APLers.
Sites/pages relating to APL-based publications.
Please submit links to sites and/or pages relating to APL-based publications.
Web sites of businesses who sell APL interpreters or APL-based software products. Note that these businesses are not usually the producers of the interpreters (see the Vendors listing), although they may also provide other services, e.g. consultancy or programming, or even services totally unrelated to APL.
Please submit links to web sites of businesses who sell APL interpreters or APL-based software products. They may also provide other services, e.g. consultancy or programming, or even services totally unrelated to APL.

Links to the producers of the interpreters do not go here (see the Vendors listing).

Web sites and pages devoted to APL user groups, clubs, organisations, etc.
Please submit links to web sites and pages devoted to APL user groups, clubs, organisations, etc.
This subcategory (perhaps misnamed) is devoted to producers of APL interpreters, i.e. the organisations that code the interpreters. They may also provide other APL or non-APL related services or products.
Please provide links to producers of APL interpreters (they may also provide other APL or non-APL related services or products).

Do not provide links to pure resellers of interpreters (see Resellers) or consultancies (see Consultants).