The socio-technical beginnings of APL
Eugene E. McDonnell · ACM SIGAPL APL Quote Quad · 1979
This paper gives some of the history of the early implementations of APL, and concentrates on the system aspects of these implementations, paying special attention to the evolution of the workspace concept, the time-sharing scheduling strategy, and the handling of the terminal. It contrasts the development of APL with the development of other time-sharing systems which were being built at the same time.