OpenVMS

VMSVAX/VMSOpenVMS AXPOpenVMS AlphaDEC VAX/VMSDigital VMSStandard streams in OpenVMSVAX.VMSVirtual Memory System (VMS)VMS (now OpenVMS)
OpenVMS is a closed-source, proprietary computer operating system for use in general-purpose computing.wikipedia
534 Related Articles

Itanium

IA-64Itanium 2Poulson
OpenVMS also runs on the HP Itanium-based families of computers.
Several groups ported operating systems for the architecture, including Microsoft Windows, OpenVMS, Linux, HP-UX, Solaris,

Digital Equipment Corporation

DECDigitalDigital Equipment Corporation (DEC)
It is the successor to the VMS Operating System (VAX-11/VMS, VAX/VMS), that was produced by Digital Equipment Corporation, and first released in 1977 for its series of VAX-11 minicomputers.
Dave Cutler: led RSX-11M and VAX/VMS operating systems development; then led Windows NT development at Microsoft

RSX-11

IASRSXRSX-11M
A companion software project, code named Starlet, was started in June 1975 to develop a totally new operating system, based on RSX-11M, for the Star family of processors.
In widespread use through the late 1970s and early 1980s, RSX-11 was influential in the development of later operating systems such as VMS and Windows NT.

Dick Hustvedt

Roger Gourd was the project lead for the Starlet program, with software engineers Dave Cutler (who would later lead development of Microsoft's Windows NT), Dick Hustvedt, and Peter Lipman acting as the technical project leaders, each having responsibility for a different area of the operating system.
Richard "Dick" Irvin Hustvedt (February 18, 1946 – April 15, 2008) was a renowned software engineer, designer and developer of several operating systems including Digital Equipment Corporation's RSX-11, and VMS.

Operating system

operating systemsOScomputer operating system
OpenVMS is a closed-source, proprietary computer operating system for use in general-purpose computing.
Microsoft responded to this progress by hiring Dave Cutler, who had developed the VMS operating system for Digital Equipment Corporation.

Computer cluster

clusterclusteringclusters
The system offers high availability through clustering and the ability to distribute the system over multiple physical machines. OpenVMS supports clustering (first called VAXcluster and later VMScluster), where multiple systems share disk storage, processing, job queues and print queues, and are connected either by proprietary specialized hardware (Cluster Interconnect) or an industry-standard LAN (usually Ethernet).
Clustering per se did not really take off until Digital Equipment Corporation released their VAXcluster product in 1984 for the VAX/VMS operating system (now named as OpenVMS).

Dave Cutler

David N. Cutler
Roger Gourd was the project lead for the Starlet program, with software engineers Dave Cutler (who would later lead development of Microsoft's Windows NT), Dick Hustvedt, and Peter Lipman acting as the technical project leaders, each having responsibility for a different area of the operating system.
These operating systems are Microsoft Windows NT, and Digital Equipment Corporation: RSX-11M, VAXELN, VMS (now OpenVMS).

DEC Alpha

AlphaAlpha AXP32 to 200
In the 1990s, it was used for the successor series of DEC Alpha systems.
Operating systems that supported Alpha included OpenVMS (previously known as OpenVMS AXP), Tru64 UNIX (previously known as DEC OSF/1 AXP and Digital UNIX), Windows NT (discontinued after NT 4.0; and pre-release Windows 2000 RC1), Linux (Debian, SUSE, Gentoo and Red Hat), BSD UNIX (NetBSD, OpenBSD and FreeBSD up to 6.x), Plan 9 from Bell Labs, as well as the L4Ka::Pistachio kernel.

VAX

DEC VAXVAX 11/780DEC VAX ULTRIX
The Star and Starlet projects culminated in the VAX 11/780 computer and the VAX-11/VMS operating system.
The "native" VAX operating system is Digital's VAX/VMS (renamed to OpenVMS in 1991 or early 1992 when it was ported to Alpha, modified to comply with POSIX standards, and "branded" as compliant with XPG4 by the X/Open consortium).

Files-11

ODS-1Record Management Services
A hierarchical, feature-rich file system (Files-11)
Files-11, also known as on-disk structure, is the file system used by Digital Equipment Corporation OpenVMS operating system, and also (in a simpler form) by the older RSX-11.

Windows NT

NTMicrosoft Windows NTWinNT
Roger Gourd was the project lead for the Starlet program, with software engineers Dave Cutler (who would later lead development of Microsoft's Windows NT), Dick Hustvedt, and Peter Lipman acting as the technical project leaders, each having responsibility for a different area of the operating system.
It has been suggested that Dave Cutler intended the initialism "WNT" as a play on VMS, incrementing each letter by one.

Record Management Services

RMS
Integrated database features such as RMS and relational databases, including Rdb, Oracle Database, MariaDB and PostgreSQL
Record Management Services (RMS) are procedures in the VMS, RSTS/E, RT-11 and high-end RSX-11 operating systems that programs may call to process files and records within files.

DECnet

CCNET
Integrated computer networking (originally DECnet, and later TCP/IP)
DECnet was built right into the DEC flagship operating system VMS since its inception.

Common Desktop Environment

CDE
OpenVMS uses the DECwindows Motif user interface (based on CDE) layered on top of OpenVMS's X11 compliant windowing system.
The Common Desktop Environment (CDE) is a desktop environment for Unix and OpenVMS, based on the Motif widget toolkit.

MicroVAX

MicroVAX IIDEC MicroVaxMicroVAX 3100
With the introduction of the MicroVAX range such as the MicroVAX I, MicroVAX II and MicroVAX 2000 in the mid-to-late 1980s, DIGITAL released MicroVMS versions specifically targeted for these platforms which had much more limited memory and disk capacity; e.g. the smallest MicroVAX 2000 had a 40MB RD32 hard disk and a maximum of 6MB of RAM, and its CPU had to emulate some of the VAX floating point instructions in software.
It ran VAX/VMS or, alternatively, ULTRIX, the DEC native Unix operating system.

X Window System

X11XX Window
OpenVMS uses the DECwindows Motif user interface (based on CDE) layered on top of OpenVMS's X11 compliant windowing system.
In its standard distribution it is a complete, albeit simple, display and interface solution which delivers a standard toolkit and protocol stack for building graphical user interfaces on most Unix-like operating systems and OpenVMS, and has been ported to many other contemporary general purpose operating systems.

Oracle Rdb

RdbOracle (née DEC) RdbVAX Rdb/ELN
Integrated database features such as RMS and relational databases, including Rdb, Oracle Database, MariaDB and PostgreSQL
Oracle Rdb is a relational database management system (RDBMS) for the Hewlett-Packard OpenVMS operating system.

VMScluster

clusterHSC50VAX-Cluster
OpenVMS supports clustering (first called VAXcluster and later VMScluster), where multiple systems share disk storage, processing, job queues and print queues, and are connected either by proprietary specialized hardware (Cluster Interconnect) or an industry-standard LAN (usually Ethernet).
A VMScluster is a computer cluster involving a group of computers running the OpenVMS operating system.

Ultrix

DEC RISC ULTRIXDEC ULTRIX
DECwindows was also provided for the Ultrix operating system.
However DEC only supplied its own proprietary operating system, VMS.

Virtual memory

virtual storagememoryswap
OpenVMS is a multi-user, multiprocessing virtual memory-based operating system (OS) designed for use in time-sharing, batch processing, and transaction processing.
The first minicomputer to introduce virtual memory was the Norwegian NORD-1; during the 1970s, other minicomputers implemented virtual memory, notably VAX models running VMS.

Time-sharing

timesharingtime sharingtime-sharing system
OpenVMS is a multi-user, multiprocessing virtual memory-based operating system (OS) designed for use in time-sharing, batch processing, and transaction processing.
DEC TSS-8 → RSTS-11, RSX-11 → VAX/VMS

DIGITAL Command Language

DCL.DCLDCL command prompt
An extensible shell command language (DIGITAL Command Language)
DCL had its roots in the IAS, TOPS-20, and RT-11 OSs and was implemented as a standard across most of Digital's OSs, notably RSX-11, but took its most powerful form in the OpenVMS OS.

VAXstation

VAXstation 3100VAXstation 4000VAXstation 8000
Prior to the introduction of DEC VAXstation systems in the 1980s, the operating system was used and managed from text-based terminals, such as the VT100, which provide serial data communications and screen-oriented display features.
DTP software for VMS on the VAXstation included Interleaf IWPS/IWPS-Plus, CGS Digi-Design/ORIS, DECwrite and WordPerfect.

Access control list

ACLACLsaccess control lists
OpenVMS has a very feature-rich file system, with support for stream and record-oriented IO, access control lists (ACLs), and file versioning.
These entries are known as access-control entries (ACEs) in the Microsoft Windows NT, OpenVMS, Unix-like, and Mac OS X operating systems.

VAX 7000/10000

VAX 7000VAX 7000 and 10000
These computers ran Digital's OpenVMS operating system.