The UCSD p-System is a highly portable operating system. It uses the
Pascal programming language, and all applications are compiled to
interpreted bytecode. This means an application written for the
p-System should run on any p-System platform, regardless of the CPU
and architecture. However, depending on the use, it could be quite
slow.
p-System, but it lost its portability advantage as the industry
standardized on the x86 IBM PC architecture.