About APL (A Programming Language) - An interesting article with a historical slant. A thought provoking read. APL-ASCII Transliteration - Jim Weigang's method for APL/ASCII transliteration explained. This has become a standard for web and newsgroup use. Benchmarks of APL vs. Other Languages - Part of the answer to questions relating to APL performance. Good Code/Bad Code & Looping - The title says it all. Every starting APL programmer (and many experienced ones) would do well to study this carefully. Waterloo APL & J Archive - Much software for APL and J: code, documents, development systems. APL FAQ - Maintained by Sam Sirlin. Vector Product Guide - The Vector Product Guide provides many links to APL sources. Catalog of compilers: APL - Lists APL compilers