Operating System: Difference between revisions

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===Open Source===
* [http://www.oberon.ethz.ch/ Oberon source]
=={{header|Pascal}}==
* Perseus: - Included inter-process communication facilities, a kernel-based structure and was designed for portability.
** [http://portal.acm.org/citation.cfm?id=892291 Perseus: A Retrospective on a Portable Operating System]
 
=={{header|PL/I}}==