An interesting article with a historical slant. A thought provoking read.

Many interesting bits of information as well as some free interpreters hosted by BURKS (the Brighton University Resource Kit for Students).

Maintained by Sam Sirlin.

The ACM's list of APL users.

Jim Weigang's method for APL/ASCII transliteration explained. This has become a standard for web and newsgroup use.

Part of the answer to questions relating to APL performance.

Collection of APL Functions for Cladistic Analysis.

Lists APL compilers

Example that the derivative of the integral returns the original function.

The title says it all. Every starting APL programmer (and many experienced ones) would do well to study this carefully.

This site compares the standard "Hello World!" program in many different computer languages, including APL.

Instructions on how to get to the forum archives.

Small French language APL site, with a bit of English.

ParkeNet APL software: William R Parke provides some interesting APL-based tools and utilities

Wide Area Differential GPS.

This library is absolutely critical for any serious APL user. This has been a famous collection of code for many years. The "cool award" has been given based on the importance of this code collection to APLers everywhere. Unfortunately the APL characters only display on Windows machines.

The Vector Product Guide provides many links to APL sources.

Much software for APL & J: code, documents, development systems.