UCSD p-System

(University of California at San Diego p-System) An early software development system designed for cross-platform portability. Source programs (BASIC, Pascal, etc.) were compiled into intermediate "p-code" programs, which were executed by an interpreter in the target machine. The UCSD p-System was available for the IBM PC in 1981, but was not very popular.

Like Java
Java, which is widely used today, uses a similar intermediate code concept to run the same source program on different platforms (see Java).

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