Scientific Time Sharing Corporation

Scientific Time Sharing Corporation (STSC) was a pioneering timesharing and consulting service company which offered APL from its datacenter in Bethesda, MD to users in the United States and Europe.

Scientific Time Sharing Corporation (STSC) was formed in 1969 in Bethesda, Maryland by Dan Dyer, Burton C. Gray, and some of the people who originally implemented the programming language APL, notably Philip S. Abrams, Lawrence M. Breed, and Allen Rose.

Together with I. P. Sharp Associates, STSC made many enhancements to the APL language, including: STSC continued to make enhancements to the interpreter, notably improving the performance of many of the primitive functions.

STSC quickly changed its focus to supply APL services for in-house and the rapidly developing personal computer (PC) market.

Arguably, the APL*Plus/386 interpreter fostered the exodus of APL applications from mainframe to PC environments, as the hardware and software were finally correctly matched to facilitate a straightforward migration of medium- to large-sized applications away from mainframes.