The APL Programming Language Source Code
Summary
The article recounts the origin of APL, Iverson notation, and the XM6 source release for the 1969-1972 APL\360 system, emphasizing its interactive timesharing environment and the language's array-centric paradigm. It also covers applications, praise/criticism, and a biography of Ken Iverson, illustrating the historical significance and potential influence on modern data-centric programming.