- http://pascal.hansotten.com ucsd-p-system/The UCSD P-System (and the popular variant Apple Pascal) extended the idea of compiler-interpreter to a complete and easy to use operating system.
- en.m.wikipedia.org UCSD PascalThere were four versions of UCSD p-code engine, each with several revisions of the p-System and UCSD Pascal.
- winworldpc.com product/ucsd-p-system/ivThe UCSD p-System is a highly portable operating system. ... Missing manual: "6936508 - UCSD Pascal Reference for the UCSD p-System".
- threedee.com jcm/psystem/In fact, the P-System operating system itself was written in UCSD Pascal, making the entire operating system relatively easy to port between platforms.
- http://edm2.com index.php/UCSD_p-SystemThe UCSD p-System is a portable, highly machine-independent operating system developed at the University of California, San Diego (UCSD).
- nsa.gov portals/75/documents/news-features/…This paper discusses the UCSD p-System, an operating system for small computers developed at the University of California at San Diego.
- Version IV.O of the UCSD p-System supports con-current processes with the use of the SIGNAL and \VAIT primitive operations on semaphores.
- academickids.com encyclopedia/UCSD_p-SystemThere were four versions of UCSD p-Code engine, each with several revisions of the p-System (and UCSD Pascal).
- williambader.com museum/at/psysversions.htmlSince it first appeared in the introductory computer science courses at UCSD, the UCSD p-System has been remodelled into many different versions.
- heathkit.garlanger.com software/OSes/UCSDPSystem/Heath Company offered a version of the UCSD P-System operating system for their both their 8-bit computers and the 16-bit H11.