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(Other operating systems for the same hardware are the members of the MVS - OS/390 - Z/OS family.)
VM/CMS has two main components, VM and CMS, each an independent operating system. VM is a virtual machine system which provides each user with what seems to be their own personal mainframe; CMS is a relatively simple single-user operating system, designed to run principally under VM. Each VM/CMS user is given their own virtual machine to run CMS in.
Development started on what was then called the "CP-40 Project", working with a modified System 360 Model 40, at IBM's Cambridge Scientific Center (CSC) in the Fall of 1964. CP-40 was a virtual machine operating system; a simple interactive computing single-user operating system, CMS, was designed to go along with it. Actual implementation started in 19651965 was a common year starting on Friday (the link is to a full 1965 calendar). Events January-February January 4 United States President Lyndon Johnson proclaims his " Great Society" during his State of the Union address. January 14 Prime Ministers of N, and the complete system was first available to users in early 1966Events January January 1 In a coup, Colonel Jean-Bedel Bokassa ousts president David Dacko and takes over the Central African Republic. January 2 Strike of public transportation workers in New York City ends January 13 January 3 First Acid Test at the Fil.
VM/CMS was not started as a formal IBM product, and for many years there was a great deal of political infighting within IBM, over what resources should be available to it, as compared with competing IBM products.
After IBM announced the System 360 Model 67, the software was converted to run on that; CP-40 was renamed CP-67 at that point. An early version of the system was installed at MIT's Lincoln Labs in 1967Events January January 4 British motorboat racer Donald Campbell dies while attempting a water speed record in Coniston Lake. January 4 Algerian revolutionary Mohammed Khider is shot in Madrid. January 6 Vietnam War: USMC and ARVN troops launch " Operatio, because of Lincoln's dissatisfaction with the "standard" IBM time-sharingAlternate uses: see Timesharing Time-sharing is an approach to interactive computing in which a single computer is used to provide apparently simultaneous interactive general-purpose computing to multiple users by sharing processor time. Because early mai offering, TSS (Time Sharing System), which was at that time very slow and unreliable. Lincoln personnel co-operated with CSC in improving the system; another influential IBM customer, Union CarbideUnion Carbide is a chemical manufacturer, now a subsidiary of The Dow Chemical Company. The company is most well-known for the Bhopal Disaster in 1984, in which the leakage of the highly toxic gas methyl isocyanate (MIC) killed thousands. The chairman War, also decided to run VM/CMS, and also contributed to its development.
By early 1968Events Undated Booker Prize for Fiction is established by Booker plc. 1968 is known as the year of the Prague Spring and also the year of the Paris riots. The ASCII character code is standardized as ANSI Standard X3. Nauru adopt his national anthem of the, word had spread, and most System 360/67 sites were actually running VM/CMS, not the "official" IBM system for the machine, TSS. This eventually led to the demise of TSS, in 1971.
Thereafter, the utility of the system (especailly within IBM, where it was heavily used in developing MVS) prevented all attempts to kill it, and IBM finally accepted the inevitable with relatively good grace, having learned through internal experience just how useful it was.
VM 370 Welcome screen :
VM/370 ONLINE
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