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Mvs
MULTIPLE VIRTUAL STORAGE, more commonly called MVS, was the most commonly used operating system on the System/370
System/370
and System/390 IBM mainframe computers . It was developed by IBM
IBM
, but is unrelated to IBM's other mainframe operating systems, e.g., VSE , VM , TPF . First released in 1974, MVS
MVS
was extended by program products with new names multiple times: * first to MVS/SE (MVS/System Extensions), * next to MVS/SP (MVS/System Product) Version 1, * next to MVS/XA (MVS/eXtended Architecture), * next to MVS/ESA (MVS/Enterprise Systems Architecture), * then to OS/390 and * finally to z/OS (when 64-bit support was added with the zSeries models)
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Z/VM
Z/VM is the current version in IBM's VM family of virtual machine operating systems . z/VM was first released in October 2000 and remains in active use and development as of 2016 . It is directly based on technology and concepts dating back to the 1960s, with IBM's CP/CMS on the IBM
IBM
System/360-67 (see article History of CP/CMS for historical details). z/VM 6.4 runs on IBM's System z family of computers. It can be used to support large numbers (thousands) of Linux virtual machines. (See Linux on z Systems
Linux on z Systems
.) On November 11, 2016, IBM
IBM
released z/VM Version 6.4 which requires z/Architecture , implemented in IBM's z196 , z114 and later models
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VM (operating System)
VM (often: VM/CMS) is a family of IBM
IBM
virtual machine operating systems used on IBM
IBM
mainframes System/370
System/370
, System/390 , zSeries , System z and compatible systems, including the Hercules emulator for personal computers. The first version, released in 1972, was VM/370, or officially VIRTUAL MACHINE FACILITY/370. This was a System/370 reimplementation of earlier CP/CMS operating system. Milestone versions included VM/SP. The current version, Z/VM , is still widely used as one of the main full virtualization solutions for the mainframe market
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Airlines Control Program
IBM
IBM
AIRLINE CONTROL PROGRAM, or ACP, is a discontinued operating system developed by IBM
IBM
beginning about 1965. In contrast to previous airline transaction processing systems , the most notable aspect of ACP is that it was designed to run on most models of the IBM System/360
System/360
mainframe computer family. This departed from the earlier model in which each airline had a different, machine-specific transaction system. Development began with SABRE (Semi-Automatic Business Research Environment), Deltamatic, and PANAMAC. From these Programmed Airline Reservations System (PARS) was developed. In 1969 the control program, ACP was separated from PARS; PARS keeping the functions for processing airline reservations and related data
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Transaction Processing Facility
TRANSACTION PROCESSING FACILITY (TPF) is an IBM
IBM
real-time operating system for mainframe computers descended from the IBM
IBM
System/360 family, including zSeries and System z9 . TPF delivers fast, high-volume, high-throughput transaction processing, handling large, continuous loads of essentially simple transactions across large, geographically dispersed networks. The world's largest TPF-based systems are easily capable of processing tens of thousands of transactions per second. TPF is also designed for highly reliable, continuous (24×7) operation. It is not uncommon for TPF customers to have continuous online availability of a decade or more, even with system and software upgrades. This is due in part to the multi-mainframe operating capability and environment
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Z/TPF
TRANSACTION PROCESSING FACILITY (TPF) is an IBM
IBM
real-time operating system for mainframe computers descended from the IBM
IBM
System/360 family, including zSeries and System z9 . TPF delivers fast, high-volume, high-throughput transaction processing, handling large, continuous loads of essentially simple transactions across large, geographically dispersed networks. The world's largest TPF-based systems are easily capable of processing tens of thousands of transactions per second. TPF is also designed for highly reliable, continuous (24×7) operation. It is not uncommon for TPF customers to have continuous online availability of a decade or more, even with system and software upgrades. This is due in part to the multi-mainframe operating capability and environment
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VP/CSS
VP/CSS was a time-sharing operating system developed by National CSS . It began life in 1968 as a copy of IBM's CP/CMS , which at the time was distributed to IBM
IBM
customers at no charge, in source code form, without support, as part of the IBM
IBM
Type-III Library . Through extensive in-house development, in what today would be termed a software fork , National CSS took VP/CSS in a different direction from CP/CMS . Although the two systems would eventually share many capabilities, their technical implementations diverged in substantive ways. VP/CSS ran on IBM
IBM
and IBM
IBM
plug compatible hardware owned by NCSS (and by a few customers with site licenses, including Bank of America
Bank of America
and Standard Oil of California
Standard Oil of California
)
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CP-67
CP-67 was the control program portion of CP/CMS , a virtual machine operating system developed for the IBM System/360-67
IBM System/360-67
by IBM's Cambridge Scientific Center . It was a reimplementation of their earlier research system CP-40 , which ran on a one-off customized S/360-40. CP-67 was later reimplemented (again) as CP-370 , which IBM released as VM/370 in 1972, when virtual memory was added to the System/370
System/370
series. Details on the development and circumstances of CP-67 can be found in the article History of CP/CMS
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Z/OS
Z/OS
Z/OS
is a 64-bit operating system for IBM
IBM
mainframes , produced by IBM
IBM
. It derives from and is the successor to OS/390 , which in turn followed a string of MVS
MVS
versions. Like OS/390, z/OS combines a number of formerly separate, related products, some of which are still optional. z/OS offers the attributes of modern operating systems but also retains much of the functionality originating in the 1960s and each subsequent decade that is still found in daily use (backward compatibility is one of z/OS's central design philosophies). z/OS was first introduced in October 2000
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History Of CP/CMS
This article covers the HISTORY OF CP/CMS — the historical context in which this important IBM time-sharing virtual machine operating system was built. It provides details to support the main CP/CMS and History of IBM articles, drawing on source material that is not readily available on-line. CP/CMS development occurred in a complex political and technical milieu. To understand the system's history, it is necessary to examine these broader forces. The following material summarizes major issues and events of the day from the perspective of CP/CMS development – a perspective that is somewhat different from (and orthogonal to) other ways of viewing the period. A key theme is the politics of a long running feud at IBM, between time-sharing and batch processing exponents. Historical notes , below, provides supporting quotes and citations from first-hand observers
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IBM CP-40
CP-40 was a research precursor to CP-67 , which in turn was part of IBM's then-revolutionary CP/CMS – a virtual machine /virtual memory time-sharing operating system for the IBM System/360 Model 67 , and the parent of IBM's VM family . CP-40 ran multiple instances of client operating systems – particularly CMS , the Cambridge Monitor System, built as part of the same effort. Like CP-67, CP-40 and the first version of CMS were developed by IBM's Cambridge Scientific Center (CSC) staff, working closely with MIT researchers at Project MAC
Project MAC
and Lincoln Laboratory
Lincoln Laboratory
. CP-40/CMS production use began in January 1967. CP-40 ran on a unique, specially modified IBM System/360
IBM System/360
Model 40
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CP/CMS
CP/CMS (CONTROL PROGRAM/CAMBRIDGE MONITOR SYSTEM) is a discontinued time-sharing operating system of the late 60s and early 70s, known for its excellent performance and advanced features. It had three distinct versions: * CP-40 /CMS, an important "one-off" research system that established the CP/CMS virtual machine architecture * CP-67 /CMS, a reimplementation of CP-40/CMS for the IBM System/360-67 , and the primary focus of this article * CP-370 /CMS, a reimplementation of CP-67/CMS for the System/370 – never released as such, but became the foundation of IBM's VM/370 operating system, announced in 1972.Each implementation was a substantial redesign of its predecessor and an evolutionary step forward. CP-67/CMS was the first widely available virtual machine architecture
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Unix
UNIX (/ˈjuː.nɪks/ ; trademarked as UNIX) is a family of multitasking , multiuser computer operating systems that derive from the original AT&T Unix, developed starting in the 1970s at the Bell Labs research center by Ken Thompson , Dennis Ritchie , and others. Initially intended for use inside the Bell System , AT&T licensed Unix to outside parties from the late 1970s, leading to a variety of both academic and commercial variants of Unix from vendors such as the University of California, Berkeley ( BSD ), Microsoft ( Xenix ), IBM ( AIX ) and Sun Microsystems (Solaris )
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Unix-like
A UNIX-LIKE (sometimes referred to as UN*X or *NIX) operating system is one that behaves in a manner similar to a Unix system, while not necessarily conforming to or being certified to any version of the Single UNIX Specification . A Unix-like application is one that behaves like the corresponding Unix command or shell . There is no standard for defining the term, and some difference of opinion is possible as to the degree to which a given operating system or application is "Unix-like". The term can include free and open-source operating systems inspired by Bell Labs ' Unix or designed to emulate its features, commercial and proprietary work-alikes, and even versions based on the licensed UNIX source code (which may be sufficiently "Unix-like" to pass certification and bear the "UNIX" trademark)
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IBM Mainframes
IBM
IBM
MAINFRAMES are large computer systems produced by IBM
IBM
since 1952. During the 1960s and 1970s, the term mainframe computer was almost synonymous with IBM
IBM
products due to their marketshare. Current mainframes in IBM's line of business computers are developments of the basic design of the IBM System/360
IBM System/360

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System/390
"SYSTEM/390 introduces the IBM
IBM
ENTERPRISE SYSTEM/9000 FAMILY" was how IBM
IBM
Marketing simultaneously announced on September 5, 1990 its next mainframe offerings, using two important numbered names: * 390, as in 360, 370, ... and * 9000, as in 90, as in 1960 for 360, 1970 for 370, ...The introduction covered new architecture, new hardware and new software. Although the 9000 family name was mentioned first in some of the day's announcements, it was clear by "the end of the day" that it was "for System/390," although it was the name S/390 that was placed on some of the actual "boxes" later shipped. The newly introduced ESA/390 architecture brought with it * MVS/ESA * VM/ESA and * VSE/ESA These systems followed the IBM
IBM
3090 , with over a decade of follow-ons, eventually leading to the IBM
IBM
System z
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