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Series of discontinued Unix operating systems by DEC
Ultrix (officially all-caps ULTRIX) is the brand name of Digital Equipment Corporation's (DEC) discontinued native Unix operating systems for the PDP-11
Ultrix
Unix software
Free and open-source software portal The Ultrix Window Manager (uwm) is a historic standard window manager software for the X Window System from X11R1
Ultrix_Window_Manager
Species of moth
Eupithecia ultrix is a moth in the family Geometridae. It is found in Sichuan and Yunnan, southwestern China. The wingspan is about 22 mm. The fore- and
Eupithecia_ultrix
Computer operating system
market. MICA attempted to address these requirements by implementing VMS and ULTRIX user interfaces on top of a common kernel that could support the system
DEC_MICA
Family of IEEE standards for compatibility between operating systems
SerenityOS Stratus OpenVOS SkyOS (discontinued) Syllable (discontinued) ULTRIX VSTa VMware ESXi Xenix Zephyr The following operating systems are not certified
POSIX
64-bit RISC instruction set architecture
6.x), Plan 9 from Bell Labs, and the L4Ka::Pistachio kernel. A port of Ultrix to Alpha was carried out during the initial development of the Alpha architecture
DEC_Alpha
Apple Inc.'s MacOS, Sun's SunOS, Sequent's Dynix, NeXT's NeXTSTEP, DEC's Ultrix and OSF/1 AXP (which became the now discontinued Tru64 UNIX). FreeBSD aims
Comparison of BSD operating systems
Comparison_of_BSD_operating_systems
Line of computers sold by Digital Equipment Corporation
Digital with the aim of allowing multiple isolated instances of VMS and ULTRIX to be run on the same hardware. VMM was intended to achieve TCSEC A1 compliance
VAX
Operating system that behaves similarly to Unix
often have Unix-like names such as AIX, A/UX, HP-UX, IRIX, Linux, Minix, Ultrix, Xenix, and XNU. These patterns do not literally match many system names
Unix-like
Unix operating system
vendors in the form of proprietary Unix distributions—such as DEC with Ultrix and Sun Microsystems with SunOS—due to its permissive licensing and familiarity
Berkeley Software Distribution
Berkeley_Software_Distribution
Family of computer operating systems
Darwin macOS iOS audioOS iPadOS tvOS watchOS bridgeOS DYNIX NeXTSTEP SunOS Ultrix Linux Android Arch ChromeOS Debian Fedora Gentoo Red Hat Slackware SUSE
Unix
operating systems: Unix (BSD): 386BSD, BSD/OS, FreeBSD, NetBSD, OpenBSD, SunOS, ULTRIX Unix (System V): AIX, A/UX, HP-UX, IRIX, SCO OpenServer, Solaris, UnixWare
Comparison_of_IRC_clients
Family of low-cost minicomputers
addition of graphics hardware. The MicroVAX family supports Digital's VMS, ULTRIX, and VAXELN operating systems. Prior to VMS V5.0, MicroVAX hardware required
MicroVAX
Family of Unix-like operating systems
enrolled in a Unix course. The course used a MicroVAX minicomputer running Ultrix, and one of the required texts was Operating Systems: Design and Implementation
Linux
Linux distribution
"X" which puts it in line with various other Unix flavors such as IRIX, Ultrix, Mac OS X and IBM AIX. CRUX does not include a GUI installation program
CRUX
Speech synthesizer and text-to-speech technology
$12,396 in 2025) Connectivity RS-232C serial interface Platform OpenVMS, ULTRIX, Digital UNIX, Windows NT Dimensions (DTC01 = W 45.7 cm x D 30.48 cm x H
DECtalk
Computer operating system
for OpenVMS layered product (originally known as the VMS/ULTRIX Connection, then as the ULTRIX Communications Extensions or UCX). TCP/IP Services is based
OpenVMS
Computing command
process accessing a specified device". Spencer compiled it for 4.2BSD and ULTRIX. Moreover, in the newsgroup net.unix-wizards, he further remarks: With all
Lsof
Computer-aided design and drafting software
Release 10 Solaris 2.0, IRIX, AIX, HP-UX and DOS Release 13 SunOS 4.1 and Ultrix Release 12 DOS (286) Release 11 Xenix and OS/2 1.x Release 10 DOS (sans-x87)
AutoCAD
Free URL data transfer client software
(HarmonyOS) OpenVMS OS/2 QNX QNX Neutrino RISC OS RTEMS Solaris Symbian Tru64 Ultrix UnixWare Windows VxWorks Zephyr The libcurl library is thread-safe and IPv6
CURL
State motto of New Hampshire, US
license plate UNIX. When DEC came out with its own Unix version, Ultrix, they printed up Ultrix plates that were distributed at trade shows. Live Free or Die
Live_Free_or_Die
Series of 16-bit minicomputers
Timesharing System / Extended) RSX-11 RT-11 TRAX (Transaction Processing system) Ultrix-11 OS/45 was a proposed operating system for the PDP-11/45 capable of batch
PDP-11
DEC brand of computers
architecture and a range of PC compatibles. The MIPS-based workstations ran ULTRIX, a DEC-proprietary version of UNIX, and early releases of OSF/1. The first
DECstation
Software emulator
AIX, NeXTSTEP, Motorola 88000, OpenVMS on VAX and DEC Alpha systems, DEC ULTRIX, and others. Bundles of SoftPC with Windows (3.x, 95, 98) were called SoftWindows
SoftPC
III) PCOS (Olivetti M20) pSOS QNX Stratus VOS Sun UNIX (later SunOS) 0.7 Ultrix Unix System III VAXELN 1983 Apple III Plus Coherent DNIX EOS GNU (project
Timeline_of_operating_systems
Finnish and American software engineer (born 1969)
exposed to Unix for the first time in the form of a DEC MicroVAX running ULTRIX. Later, he bought computer science professor Andrew Tanenbaum's book Operating
Linus_Torvalds
Software development philosophy
Engineering Group (UEG), published The UNIX Philosophy based on his own Unix (Ultrix) port development at DEC in the 1980s and discussions with colleagues. He
Unix_philosophy
Early web browser (1993–1997)
Program logo in top-right corner (predecessor to throbber) All Above + DEC Ultrix 0.8 Feb 14, 1993 0.9 Mar 4, 1993 Audio annotations (SGI only); Product name
NCSA_Mosaic
enterprise customers. There were also lesser–used versions for SCO Unix, DG/UX, Ultrix and Windows NT. From the initial designs in 1987, OpenMail was primarily
HP_OpenMail
Software that translates code from one programming language to another
compiler. Unix/VADS could be hosted on a variety of Unix platforms such as DEC Ultrix and the Sun 3/60 Solaris targeted to Motorola 68020 in an Army CECOM evaluation
Compiler
Fourth generation programming language
1986, supported platforms included Microsoft Xenix (on IBM PC AT), DEC Ultrix (running on Microvax II, VAX-11/750, VAX-11/785, VAX 8600), Altos 2086,
Informix-4GL
Network protocol suite
operating system OpenVMS since its inception. Later Digital ported it to Ultrix, OSF/1 (later Tru64) as well as Macintosh and IBM PC compatibles running
DECnet
Minicomputer by Digital Equipment Corporation
performance for half the cost. The VAX 6000 family supports Digital's VMS and ULTRIX operating systems. The VAX 6000 was housed in a cabinet which contained
VAX_6000
Family of DEC workstation computers
architecture. VAXstation systems were typically shipped with either the OpenVMS or ULTRIX operating systems. Many members of the VAXstation family had corresponding
VAXstation
Fictional character
retrieved 15 December 2007 - The artwork was intended for an ad for DEC's Ultrix. Amazon.com, The Design and Implementation of the 4.3 BSD UNIX Operating
BSD_Daemon
File format
specification. ECOFF was developed for the MIPS platform, and was used by DEC Ultrix and Tru64 (previously Digital Unix and OSF/1), SGI Irix, Linux/MIPS and
ECOFF
Window manager that draws all windows in a specific order, allowing them to overlap
A screenshot of Ultrix Window Manager, which uses a stacking window manager. Note how the stacked windows overlap each other.
Stacking_window_manager
Windowing system for bitmap displays on UNIX-like systems
released Version 6 in January 1985. DEC, then preparing to release its first Ultrix workstation, judged X the only windowing system likely to become available
X_Window_System
Computer operating system
on the OSF/1 operating system. DEC's previous UNIX product was known as Ultrix and was based on BSD. It is unusual among commercial UNIX implementations
Tru64_UNIX
RISC instruction set architecture
was intended as a replacement for both VAX/VMS and ULTRIX on PRISM, although a standalone PRISM ULTRIX port was eventually created when the original multi-personality
DEC_PRISM
Discontinued graphical web browser
years ago (1994-04-25) Written in C Platform Unix (Sun-4, NeXT/CubX, DEC Ultrix) using Motif Available in English Type Web browser License Public Domain
Erwise
Stacking C 1987 1.0.13.1 2025-05-06 MIT-open-group MIT-CMU XFree86-1.0 1.2 Ultrix Window Manager (uwm) Stacking C 1985 Final 1988-10-27 Similar to BSD licenses
Comparison of X window managers
Comparison_of_X_window_managers
Directory structure used by a Unix-like operating system
Information Manual "hier(7) man page for 2.9.1 BSD". "hier(7) man page for ULTRIX 4.2". "hier(7) man page for SunOS 4.1.3". hier(7) – Linux Programmer's Manual
Unix_filesystem
Command-line web browser
are official ports to Apollo/Domain, IBM RS6000, DECStation/ultrix, VAX/VMS, VAX/Ultrix, MS-DOS, Unix, Windows, Classic Mac OS, Linux, MVS, VM/CMS, FreeBSD
Line_Mode_Browser
versions of Unix, such as Sun's SunOS, Sequent's Dynix, NeXT's NeXTSTEP, DEC's Ultrix and OSF/1 AXP (now Tru64 UNIX). Parts of NeXT's software became the foundation
History of the Berkeley Software Distribution
History_of_the_Berkeley_Software_Distribution
Open-source turn-based strategy game
game available on many other operating systems, including Linux, Solaris, Ultrix, AmigaOS, and Microsoft Windows. Linux distributions started to include
Freeciv
Vector graphics editor from Adobe Inc
Illustrator for Display PostScript licensees NeXT, Digital Equipment Corporation Ultrix, Silicon Graphics IRIX, and Sun Solaris platforms, but they were discontinued
Adobe_Illustrator
VAX LISP was an implementation of Common Lisp for VMS and ULTRIX on 32-bit VAXs. It was the first Common Lisp to be written for non-Lisp machines. It was
VAX_Common_Lisp
of UNIX called ULTRIX which supported TCP/IP. Almost as a "skunk works" project, it produced a layered product for VMS called UCX (Ultrix Communications
TCPware
Computer aided design software
MS-DOS 3.3 Mac OS 7 DWG R11/R12 file format. Last release for SunOS 4.1 and Ultrix. February 1993 Windows 3.1 Release 13 13.0 November 1994 AC1012 13 MS-DOS
AutoCAD_version_history
Series of server computers
architecture processors and ran DEC's version of the UNIX operating system, called ULTRIX. They ranged in size from workstation-style desktop enclosures to large
DECsystem
Abstract layer on top of a more concrete file system
the File System Switch in System V Release 3, the Generic File System in Ultrix, and the VFS in Linux. In OS/2 and Microsoft Windows, the virtual file system
Virtual_file_system
Workstation computer
the features of Taos was that it supported the Ultrix binary calling interface, allowed existing Ultrix binaries compiled for the MicroVAX run unmodified
DEC_Firefly
Operating system microkernel
user-space, the overhead became higher still: benchmarks between Mach and Ultrix on a MIPS R3000 showed a performance hit as great as 67% on some workloads
Mach_(kernel)
American computer engineer
for Unix development and for spearheading the native VAX version of UNIX, Ultrix, during his tenure at Digital Equipment Corporation (DEC). Stettner started
Armando_Stettner
Relational database management system
system. Digital provided a relational database for their Ultrix operating system named ULTRIX/SQL, but it was based on Ingres instead of Rdb. "Oracle Rdb
Oracle_Rdb
Linux LynxOS MINIX MNOS MOS NeXTSTEP QNX Redox RISC iX SOX SunOS SerenityOS Ultrix uNETix Research Unix Comparison of BSD operating systems History of the
List_of_Unix_systems
Key derivation function of password hash
modification of DES, which allows passwords of up to 16 characters. Used on Ultrix and Tru64. The GNU C Library (glibc) used by almost all Linux distributions
Crypt_(C)
(Personal Computing Systems Architecture). PATHWORKS server ran on OpenVMS and Ultrix (and later Digital UNIX) and enabled a system or cluster to act as a file
Pathworks
Family of superminicomputers by Digital Equipment Corporation
numbers. As with other VAX systems, they were sold with either the VMS or Ultrix operating systems. It was intended that the 8800 was to have been replaced
VAX_8000
1980s GUI development environment
created by NASA in the 1980s. It is available for us on DEC VAX ULTRIX, DEC RISC ULTRIX, Sun, VAX/VMS, Silicon Graphics, HP9000, and IBM RS/6000 based
Transportable Applications Environment
Transportable_Applications_Environment
the DEC PRISM Digital UNIX – derived from OSF/1, became HP's Tru64 UNIX Ultrix VMS – originally by DEC (now by VMS Software Inc.) for the VAX mini-computer
List_of_operating_systems
Kernel that provides fewer services than a traditional kernel
and Bershad compared memory cycles per instruction (MCPI) of monolithic Ultrix with those of microkernel Mach combined with a 4.3BSD Unix server running
Microkernel
Mainframe computer from DEC
well. As with other VAX systems, they were sold with either the VMS or Ultrix operating systems. The systems trace their history to DEC's 1984 licensing
VAX_9000
Early commercial UNIX operating system
V was infused with features from BSD, while BSD variants such as DEC's Ultrix received System V features. AT&T and Sun Microsystems worked together to
UNIX_System_V
Playing video games on Linux-based operating systems
Unixware, Tru64 UNIX, LynxOS (which features inbuilt Linux compatibility), Ultrix, OpenVMS, z/OS UNIX System Services, and even A/UX. The games Doom and Quake
Video_games_and_Linux
Microsoft network operating system
basis for Digital Equipment Corporation's Pathworks product for OpenVMS, Ultrix and Tru64. Despite support from 3Com, IBM, Digital, and Digital Communications
LAN_Manager
File system for CD-R and CD-ROM optical discs
extensions (which preserve the Amiga protection bits and file comments) QNX ULTRIX Wii and Wii U OS/2, eComStation and ArcaOS BeOS, Zeta and Haiku OpenVMS
ISO_9660
World War I maritime disaster
through clouds and six ships are steaming. Signed R Baudichon. Legend: Ultrix America Juris, 1917 U.S.A 1918 (America avenger of right). The reverse shows
Sinking_of_the_RMS_Lusitania
- Trusted computing - TTL UDDI - Ubiquitous Knowledge Processing Lab - Ultrix - Ungermann-Bass - Uniform Resource Identifier - Uniform Resource Locator
Index of Internet-related articles
Index_of_Internet-related_articles
COFF Unix-like none Yes by file Yes No No Yes Yes Extension No No ECOFF Ultrix, Tru64 UNIX, IRIX none Yes by file Yes No No Yes Yes Yes No No XCOFF IBM AIX
Comparison of executable file formats
Comparison_of_executable_file_formats
Atari ST (under GEMDOS), Acorn Archimedes (under RISC OS), VAX-11 under Ultrix-32 Algol68toC[better source needed] (ctrans) 1985 Electronics UK ctrans
List_of_compilers
American computer manufacturer (1957–1998)
accompanied by the MICA project, which intended to consolidate VMS and ULTRIX into a single operating system. Another group concluded that new workstations
Digital_Equipment_Corporation
operating system, and supported by several other DEC operating systems such as Ultrix. It normally used the DECnet networking system as opposed to TCP/IP. Similar
Mail-11
1979 minicomputer operating system
additional device drivers. UEG evolved into the group that later developed Ultrix. Due to its power yet elegant simplicity, many old-time Unix users remember
Version_7_Unix
Topics referred to by the same term
systems RT-11, real-time operating system RSX-11 DSM-11 BATCH-11/DOS-11 Ultrix-11 Linux operating system distributive versions: Debian 11, the Debian Project
System_11
American computer engineer and businessman (1926–2011)
produce a native BSD-based UNIX product on the VAX line of computers called Ultrix. However, this line never got enthusiastic comprehensive support at DEC
Ken_Olsen
Dialect of the Scheme programming language
Multimax SPARC: SunOS 4 and above, Solaris, Unix on Connection Machine 5 VAX: Ultrix Computer programming portal Slade, Stephen (1987). The T programming language:
T_(programming_language)
Cathedral in Catania, Sicily, Italy
window with the Latin acronym NOPAQVIE (Noli offendere Patriam Agathae quia ultrix injuriarum est), translated as "Offend not the country of Agatha, for she
Catania_Cathedral
MIPS, Motorola 88000, PowerPC, SuperH Unix-like NetBSD, OpenBSD, Linux, Ultrix, Sprite BSD Hercules Roger Bowler Any z/Architecture Windows, FreeBSD, NetBSD
Comparison of platform virtualization software
Comparison_of_platform_virtualization_software
OpenBSD/64, NetBSD/64, MacOS/64, SunOS/64, Android/64, Win-Cygwin/64; VAX: Ultrix/32; Alpha: Tru64OSF1/64, Linux/64, FreeBSD/64, OpenBSD/64; IA-64: HP-UX/32
Binary Modular Dataflow Machine
Binary_Modular_Dataflow_Machine
Computer bus used on VAX computers
Installation and Troubleshooting manual, EK-410AB-MG DEC Technical article: [ Ultrix ] How To Configure a kfqsa on a DECstation (sic) 5500 (DS5500), Last Technical
Digital Storage Systems Interconnect
Digital_Storage_Systems_Interconnect
Programming language standard
Equipment Corporation's implementation that ran on VAX systems running VMS or ULTRIX. XLISP An implementation written by David Betz. Common Lisp is used to develop
Common_Lisp
Programming language
was ported to the Alpha in two variants: DSM for OpenVMS, and as DSM for Ultrix. InterSystems with ISM (InterSystems M) on VMS (M/VX), ISM-11 later M/11+
MUMPS
Early database management system
record. INP is implemented on the DEC VAX and PDP-11 under BSD Unix or ULTRIX. Versions are available for SunOS and Onyx. Several operators can simultaneously
INP_(database)
Operating system mechanism
or had hard-coded rules for accessing files or network-stored databases. Ultrix was a notable exception with its nearly identical functionality of the NSS
Name_Service_Switch
Open source software security toolkit library
HP-UX, IRIX, Linux, MP-RAS, OSF/1, QNX, SCO UnixWare, Solaris, SunOS, Ultrix, and UTS4), VM/CMS, Windows 3.x, Windows 95/98/ME, Windows CE/PocketPC/SmartPhone
Cryptlib
Word processing application
including AT&T, NCR, SCO Xenix, SCO OpenServer, UnixWare, Microport Unix, DEC Ultrix, Pyramid Tech Unix, Tru64, IBM AIX, Motorola System V/88, and HP-UX, SGI
WordPerfect
Computer networking protocol suite
which implemented the protocol suite for various Unix flavours including Ultrix, SunOS, BSD and IRIX. This package is no longer actively maintained. Netatalk
AppleTalk
Rule-based or production system computer language
the OPS5 language definition, developed for use with the OpenVMS, RISC ULTRIX, and DEC OSF/1 operating systems. McDermott, John (1982-09-01). "R1: A rule-based
OPS5
American relational database company
workstations, AT&T System V, Sun, and DEC VAX with BSD/UNIX, VAX/VMS, or ULTRIX. It also supported up to 50 databases, 32,000 tables per database, 2 billion
Britton_Lee,_Inc.
Topics referred to by the same term
Milwaukee University of Warmia and Mazury in Olsztyn, Poland In computing: Ultrix Window Manager UDE Window Manager Others Ticker symbol for ProShares Ultra
UWM
FTP server software
other mainstream commercial operating systems of the time, including DEC's Ultrix, IBM's AIX and Sun's SunOS and Solaris operating systems. It was also soon
WU-FTPD
Programming language
Atari ST (under GEMDOS), Acorn Archimedes (under RISC OS), VAX-11 under Ultrix-32 ALGOL68toC (ctrans) 1985 Electronics UK ctrans from ELLA ALGOL 68RS Portable
ALGOL_68
American computer manufacturer
product expected in late 1992. Consequently, DeskStation hoped to license Ultrix from Digital as an interim measure, aiming to provide binary compatibility
DeskStation_Technology
Software company based in Santa Cruz, California
SCO's Open Desktop as another, and adding in elements of DEC's previous Ultrix flavor, to produce a Unix for the ACE platform. SCO created a top-level
Santa_Cruz_Operation
Large genus of geometer moths
tutsiana Eupithecia uighurica Eupithecia uinta Eupithecia ultimaria Eupithecia ultrix Eupithecia undata Eupithecia undiculata Eupithecia undulataria Eupithecia
Eupithecia
Operating system with support for multilevel security
(XTS Unix) Bull (AIX) Data General (DG/UX) Digital Equipment Corporation (Ultrix) Forcepoint (Hardened SELinux) Gemini Computers (GEMSOS) General Dynamics
Trusted_operating_system
American computer scientist
compression and image rendering software library that shipped with every Ultrix and VMS computer. Between 1990 and 1992, he worked on the Jvideo hardware
Victor_Bahl
Line of computer workstations
that DEC also manufactured the DECstation line of workstations running Ultrix, which also used MIPS processors and the TURBOchannel bus). The Magnum 3000
MIPS_Magnum
ULTRIX
ULTRIX
ULTRIX
ULTRIX
Male
Romanian
Romanian form of Greek Vasilios, VASILE means "king."
Boy/Male
Indian
Surrounding with Food
Boy/Male
Egyptian
Born of twins.
Male
English
Variant spelling of English Donal, DONALL means "world ruler."
Girl/Female
Indian
Girl with golden body
Boy/Male
Muslim
Insight, Wisdom
Boy/Male
Tamil
The enduring sound, Heaven, Certainly, Eternally
Male
Hebrew
(×—Ö²× ï‹×šÖ°) Hebrew name CHANOWK means "dedicated" or "initiated." In the bible, this is the name of the eldest son of Cain, and a son of Jared the father of Methuselah. Enoch is the Anglicized form.
Girl/Female
Hindu
Lotus in the heart of Lord Vishnu, Goddess Lakshmi
Boy/Male
Tamil
ULTRIX
ULTRIX
ULTRIX
ULTRIX
ULTRIX