APL

APL Programming Language
Growing article, with links to many related topics. [Wikipedia]
http://en.wikipedia.org/wiki/APL_programming_language

Hello, World Program
Several variants written in APL.
http://www2.latech.edu/~acm/helloworld/apl.html

Why APL?
Anonymous essay from 1983 published by ACM SIGAPL, which explains the strengths of the APL approach to algorithm design.
http://www.sigapl.org/whyapl.htm