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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.
IBM 704 mainframe at NACA in 1957. From 1952 into the late 1960s, IBM manufactured and marketed several large computer models, known as the IBM 700/7000 series.The first-generation 700s were based on vacuum tubes, while the later, second-generation 7000s used transistors.
IBM had demonstrated use of a mainframe instruction set in their first desktop computer—the IBM 5100, released in 1975.This product used microcode to execute many of the System/370's processor instructions, so that it could run a slightly modified version of IBM's APL mainframe program interpreter.
The history of IBM mainframe operating systems is significant within the history of mainframe operating systems, because of IBM's long-standing position as the world's largest hardware supplier of mainframe computers.
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.
Pages for logged out editors learn more. Contributions; Talk; Mainframe computers
Generali chose the BMC CMF MONITOR solution because of its superior ability to reduce the workload on its z/OS® mainframe computer compared to the IBM® alternative, while providing a single pane ...
This list of computer size categories attempts to list commonly used categories of computer by the physical size of the device and its chassis or case, in descending order of size.