Virtual Memory System

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Virtual Memory System

(operating system)
(VMS) DEC's proprietary operating system originally produced for its VAX minicomputer.

VMS V1 was released in August 1978. VMS was renamed "OpenVMS" around version 5.5. The first version of VMS on DEC Alpha was known as OpenVMS for AXP V1.0, and the correct way to refer to the operating system now is OpenVMS for VAX or OpenVMS for Alpha. The renaming also signified the fact that the X/Open consortium had certified OpenVMS as having a high support for POSIX standards.

VMS is one of the most secure operating systems on the market (making it popular in financial institutions). It currently (October 1997) has the best clustering capability (both number and distance) and is very scalable with binaries portable from small desktop workstations up to huge mainframes.

Many Unix fans generously concede that VMS would probably be the hacker's favourite commercial OS if Unix didn't exist; though true, this makes VMS fans furious.


Usenet newsgroup: news:comp.os.vms.

References in periodicals archive ?
It also integrates an advanced virtual memory system that helps consumers use photos on a home PC that typically has low amounts of memory.
OPEN/image for VAX software is designed to make it easy for programmers to integrate image services into any VAX environment supporting Virtual Memory System (VMS) Release 5.
The new release will provide enhanced multi-threading, newer virtual memory systems and numerous I/O improvements, such as increased address space of the kernel from 1GB to nearly 4GB, which will have a significant impact on the number of users that large Oracle deployments can sustain.
Building on NetBSD's respected TCP/IP implementation, the component product line includes the most advanced networking capability in the industry, with IPv4, IPv6, IPsec, zero-copy on write, checksum offload capabilities, and an extensive series of additional optimizations to device drivers and the virtual memory systems.
During his career, Yourdon has worked on more than 25 different mainframe computers and has been involved in a number of pioneering technologies, including early time-sharing operating systems and virtual memory systems.

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