Conference paper
APL2 and PS/2: The language, the systems, the Peripherals
M. Alfonseca, D.A. Selby
APL 1989
APL2, and APL before it, have always been criticized for not embodying formal program flow control structures. It is proposed that a set of reserved words be added to the APL2 language. This set could include if',
else', `while', etc. This extension should enhance performance and improve the readability of programs. This improved readability could lead to more maintainable code.
M. Alfonseca, D.A. Selby
APL 1989