Ultrix
Operating system
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Ultrix is the brand name of Digital Equipment Corporation's discontinued native Unix operating systems for the PDP-11, VAX, MicroVAX and DECstations. Wikipedia
Default user interface: Command-line interface, DECwindows GUI
Initial release: 1984; 40 years ago
Latest release: 4.5 / 1995; 29 years ago
License: Proprietary
OS family: Unix (4.2BSD)
Source model: Closed source