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Domain/OS
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<p>Domain/OS is the discontinued <a href="/facts/Operating_system/8XTuvMh2">operating system</a> used by the <a href="/facts/Apollo%2fDomain/qdXLE7E1">Apollo/Domain</a> line of <a href="/facts/Workstation/h5tK4hTt">workstations</a> manufactured by <a href="/facts/Apollo_Computer/AyhaS46l">Apollo Computer</a>. It was originally launched in 1981 as AEGIS, and was rebranded to Domain/OS in 1988 when <a href="/facts/Unix/0pNL2seI">Unix</a> <a href="/facts/Universe_(Unix)/mIKb4DvH">environments</a> were added to the operating system. It is one of the early <a href="/facts/Distributed_operating_system/Vm9Eu6Q4">distributed operating systems</a>. <a href="/facts/Hewlett-Packard/abuNSYNu">Hewlett-Packard</a> supported the operating system for a short time after they purchased Apollo, but they later ended the product line in favor of <a href="/facts/HP-UX/hIvLDdJF">HP-UX</a>. HP ended final support for Domain/OS on January 1, 2001. </p>