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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.
CSX Corporation is an American holding company focused on rail transportation and real estate in North America, among other industries. The company was established in 1980 as part of the Chessie System and Seaboard Coast Line Industries merger.
Transaction Processing Facility (TPF) [2] is an IBM real-time operating system for mainframe computers descended from the 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 ...
Since the late 1990s, PC processors have become fast enough to perform mainframe emulation without the need for a coprocessor card. There are currently several personal computer emulators available that support System/390 and z/Architecture. FLEX-ES by Fundamental Software emulates both System/390 (ESA/390) and z/Architecture. Claimed to be one ...
Burroughs made military computers, such as the D825 (the "D" prefix signifying it was for defense industrial use), in its Great Valley Laboratory in Paoli, Pennsylvania. [10] [11] The D825 was, according to some scholars, the first true multiprocessor computer. [12] Paoli was also home to the Defense and Space Group Marketing Division. [13]
The Burroughs Large Systems Group produced a family of large 48-bit mainframes using stack machine instruction sets with dense syllables. [NB 1] The first machine in the family was the B5000 in 1961, which was optimized for compiling ALGOL 60 programs extremely well, using single-pass compilers.
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 history of the personal computer as a mass-market consumer electronic device began with the microcomputer revolution of the 1970s. A personal computer is one intended for interactive individual use, as opposed to a mainframe computer where the end user's requests are filtered through operating staff, or a time-sharing system in which one large processor is shared by many individuals.