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IBM mainframes are large computer systems produced by IBM since 1952. During the 1960s and 1970s, IBM dominated the computer market with the 7000 series and the later System/360, followed by the System/370. Current mainframe computers in IBM's line of business computers are developments of the basic design of the System/360.
The IBM System/370 (S/370) is a range of IBM mainframe computers announced as the successors to the System/360 family on June 30, 1970. The series mostly [b] maintains backward compatibility with the S/360, allowing an easy migration path for customers; this, plus improved performance, were the dominant themes of the product announcement.
An IBM System z9 mainframe. A mainframe computer, informally called a mainframe or big iron, [1] is a computer used primarily by large organizations for critical applications like bulk data processing for tasks such as censuses, industry and consumer statistics, enterprise resource planning, and large-scale transaction processing.
International Business Machines (IBM) used to dominate the computer industry -- especially in the 1960s when mainframe computers were the only game in town. During the 1970s, that dominance gave ...
The IBM System/360 (S/360) is a family of mainframe computer systems announced by IBM on April 7, 1964, [1] and delivered between 1965 and 1978. [2] System/360 was the first family of computers designed to cover both commercial and scientific applications and a complete range of applications from small to large.
IBM avoided the term "virtual memory", allegedly because the word "memory" might be interpreted to imply that IBM computers could forget things. All modern IBM mainframe operating systems except z/TPF are descendants of those included in the "System/370 Advanced Functions" announcement – z/TPF is a descendant of ACP , the system which IBM ...
The 3270 series was designed to connect with mainframe computers, often at a remote location, using the technology then available in the early 1970s. [2] The main goal of the system was to maximize the number of terminals that could be used on a single mainframe.
The IBM System/370 Model 145 was announced September 23, 1970, [1] three months after the 155 and 165 [2] models. It was the fourth member of the IBM System/370 line of computers, [ a ] and was the first IBM computer to use semiconductor memory for its main memory instead of magnetic core memory . [ 4 ]