Domain/OS is a proprietary operating system written in [[Pascal]]. - Website - Source - Documentation - [Wikipedia](https://en.wikipedia.org/wiki/Domain/OS) > **Domain/OS** is the discontinued [operating system](https://en.wikipedia.org/wiki/Operating_system "Operating system") used by the [Apollo/Domain](https://en.wikipedia.org/wiki/Apollo/Domain "Apollo/Domain") line of [workstations](https://en.wikipedia.org/wiki/Workstation "Workstation") manufactured by [Apollo Computer](https://en.wikipedia.org/wiki/Apollo_Computer "Apollo Computer"). # Notability It is a distributed, network-first operating system from the 80s with a very lovely brutalist minimal GUI. # Philosophy # Hardware Support # Features > Domain/OS implements functionality derived from both [System V](https://en.wikipedia.org/wiki/UNIX_System_V "UNIX System V") and early [BSD Unix](https://en.wikipedia.org/wiki/Berkeley_Software_Distribution "Berkeley Software Distribution") systems. It improves on AEGIS by providing a core OS upon which the user can install any or all of three [environments](https://en.wikipedia.org/wiki/Universe_(Unix) "Universe (Unix)"): AEGIS, System V Unix, and BSD Unix. # History > It was originally launched in 1981 as **AEGIS**, and was rebranded to Domain/OS in 1988 when [Unix](https://en.wikipedia.org/wiki/Unix "Unix") [environments](https://en.wikipedia.org/wiki/Universe_(Unix) "Universe (Unix)") were added to the operating system. The final version 10.4 was released in 1992. > HP ended final support for Domain/OS on January 1, 2001. # References - https://apollo.maxnt.co.jp/apollo/english/ - http://web.mit.edu/kolya/www/csa-faq.html - https://www.zepa.net/apollo/ - https://retrocomputingforum.com/t/anyone-remember-apollos-ncs-network-computing-system-from-around-1990/4079 - https://techmonitor.ai/technology/apollo_positions_itself_to_implement_emerging_standards_with_domainos - https://yosihiro.com/book/lock-the-door/book/yakusya.html - https://en.wikipedia.org/wiki/Domain/OS - https://ja.wikipedia.org/wiki/Domain/OS - The Japanese article contains a lot more information than the English one