🔗 APL since 1978 - in Proceedings of the ACM on Programming Languages
“The Evolution of APL, the HOPL I paper by Falkoff and Iverson on APL, recounted the fundamental design principles which shaped the implementation of the APL language in 1966, and the early uses and other influences which shaped its first decade of enhancements” by Roger Hui. (108 pages). Should be a comprehensive historical review of the APL language.