UCSD Pascal

The UCSD Pascal compiler was distributed as part of a portable operating system, the p-System[?].

There were four versions of UCSD Pascal (and the p-System):

• Version I

Original version, never distributed outside of the University of California, San Diego.

• Version II

Widely distributed, available on many early microcomputers.

• Version III

Custom version written for Western Digital to run on their Pascal Micro-Engine[?] microcomputer.

• Version IV

Commercial version, developed and sold by Sof-tech. Did not sell well due to combination of their pricing structure, performance problems due to P-code interpreter, and competition with native operating systems (which it often ran on top of). After Sof-tech droppped the product it was picked up by Pecan Systems (a relatively small company formed of p-System users and fans). Sales revived somewhat, due mostly to Pecan's reasonable pricing structure, but the p-System and UCSD Pascal gradually lost the market to native operating systems and compilers.