IBM System/360

The IBM System/360 (S/360) was a mainframe computer system family announced by IBM on April 7, 1964, and delivered between 1965 and 1978. It was the first family of computers designed to cover the complete range of applications, from small to large, both commercial and scientific. The design made a clear distinction between architecture and implementation, allowing IBM to release a suite of compatible designs at different prices. All but the most expensive systems used microcode to implement the instruction set, which featured 8-bit byte addressing and binary, decimal and floating-point calculations.

The slowest System/360 models announced in 1964 ranged in speed from 0.0018 to 0.034 MIPS; the fastest System/360 models were approximately 50 times as fast with 8 kB and up to 8 MB of internal main memory, though the latter was unusual, and up to 8 megabytes of slower Large Core Storage (LCS). A large system might have as little as 256 kB of main storage, but 512 kB, 768 kB or 1024 kB was more common.

The 360s were extremely successful in the market, allowing customers to purchase a smaller system with the knowledge they would always be able to migrate upward if their needs grew, without reprogramming of application software or replacing peripheral devices. The design is considered by many to be one of the most successful computers in history, influencing computer design for years to come.

The chief architect of the S/360 was Gene Amdahl, and the project was managed by Fred Brooks, responsible to Chairman Thomas J. Watson Jr. The 360's commercial release was piloted by another of Watson's lieutenants John R. Opel who managed the launch of IBM’s System 360 mainframe family in 1964.

Application level compatibility (with some restrictions) for System/360 software is maintained until present day with the IBM zSeries computers.

Read more about IBM System/360:  Component Names, Peripherals, Remaining Machines

Other related articles:

... The AMC 360 had a displacement of 359.80 CID (5,896.1 cc) ... The 2-barrel produced 235 hp (175 kW 238 PS) to 245 hp (183 kW 248 PS) in 1970 to early 71 while the 4-barrel produced 285 hp (213 kW 289 PS) to 295 hp (220 kW 299 PS), 175 hp (130 kW 177 PS) to 220 hp (164 kW 223 PS) from mid-1971 to 1975, 140 hp (104 kW 142 PS) to 180 hp (134 kW 182 PS) in 1976, 129 hp (96 kW 131 PS) in 1977, and 160 hp (119 kW 162 PS) from 1978 to 1991 ...

... Eustathius of Antioch, Patriarch of Antioch (approximate date) Murong Jun, emperor of the Former Yan (b. 319) ...

Famous quotes containing the word system:

    He is not a true man of science who does not bring some sympathy to his studies, and expect to learn something by behavior as well as by application. It is childish to rest in the discovery of mere coincidences, or of partial and extraneous laws. The study of geometry is a petty and idle exercise of the mind, if it is applied to no larger system than the starry one.
    Henry David Thoreau (1817–1862)