Editing Domain/OS (section)

{{Short description|Discontinued operating system}}
{{Refimprove|date=February 2008}}
{{Infobox OS
| name                   = Domain/OS
| logo                   = Apollo Computer logo.svg
| screenshot             = domain-os-dm.png
| caption                = Domain/OS 10.4, showing a Display Manager (DM) session
| developer              = [[Apollo Computer]], [[Hewlett-Packard]]
| source_model           =
| kernel_type            = {{plainlist|
* AEGIS: [[Monolithic kernel|Monolithic]]
* Domain/OS: [[Microkernel]]
}}
| supported_platforms    = [[Apollo/Domain]] workstations
| ui                     = DM [[windowing system]], [[Command-line interface|CLI]]
| family                 = [[Multics-like]] and [[Unix-like]]
| released               = {{Start date and age|1981|03|27}} (Aegis SR1)
| latest_release_version = Domain/OS SR10.4.1.2
| latest_release_date    = March 1992 (for SR10.4)<ref>{{cite web|url=http://bitsavers.org/pdf/apollo/release_notes/018901-A00_10.4_Release_Notes_Mar92.pdf|title=Apollo Domain System Software Release Document 10.4|date=March 1992}}</ref>
| latest_test_version    =
| latest_test_date       =
| marketing_target       =
| programmed_in          = [[Pascal (programming language)|Pascal]]
| prog_language          = [[C (programming language)|C]], [[C++]], [[Fortran]], [[Pascal (programming language)|Pascal]]
| language               = [[English language|English]]
| updatemodel            =
| package_manager        =
| working_state          = Historic
| license                =
| website                =
| userland               = AEGIS, [[Berkeley Software Distribution|BSD]], [[System V]]
}}
'''Domain/OS''' is the discontinued [[operating system]] used by the [[Apollo/Domain]] line of [[workstation]]s manufactured by [[Apollo Computer]]. It was originally launched in 1981 as '''AEGIS''', and was rebranded to Domain/OS in 1988 when [[Unix]] [[Universe (Unix)|environments]] were added to the operating system. It is one of the early [[distributed operating system]]s.<ref>{{cite book
 | first=Michael J. | last=Jipping
 |author2=McDowall, Ian |author3=Gjertsen, Freddie  | year=1999
 | title=Smartphone Operating System Concepts with Symbian OS: A Tutorial Guide | publisher=John Wiley and Sons
 | isbn=0-470-03449-1
 | page=14 }}</ref> [[Hewlett-Packard]] supported the operating system for a short time after they purchased Apollo, but they later ended the product line in favor of [[HP-UX]]. HP ended final support for Domain/OS on January 1, 2001.