Page "UCSD Pascal" Paragraph 1

UCSD Pascal was developed at The University of California, San Diego Institute for Information Systems in 1978 to provide students with a common operating system that could run on any of the then available microcomputers as well as campus DEC PDP-11 minicomputers.

UCSD p-System ( Version IV, supplied by SofTech ) was one of three operating systems ( along with PC-DOS and CP / M-86 ) that IBM offered for its original IBM PC ; but the p-System never sold very well for the IBM PC, mainly because of a lack of applications and because it was more expensive than the other choices.

Previously, IBM had offered the UCSD p-System as an option for Displaywriter, an 8086-based dedicated word processing machine ( not to be confused with IBM's DisplayWrite word processing software.

) ( The Displaywriter's native operating system had been developed completely internally and was not opened for end-user programming.