|(computer)||IBM 360 - The generic name for the CPUs and architecture
released by IBM in 1964. The 360 was marketed as a general
purpose computer with 'all round' functionality - hence 360
Models ranged from the 360/20 to the 360/65 and later the
360/95, with typical memory configurations from 16K to 1024K.
Elements of the architecture, such as the basic instruction set are still in use on IBM mainframes today. Associated
operating systems included DOS, OS/MFT and OS/MVT.
The 360 architecture was based on an 8-bit byte, 16 general
purpose registers, 24-bit addressing, and a PSW (Program
Status Word) including a location counter.
Gene Amdahl, then an IBM employee, is generally acknowledged
as the 360's chief architect. He later went on to found
Amdahl Corporaton, a manufacture of PCM mainframe
The 360's predecessors were the smaller IBM 1401 and the
large IBM 7090 series.
See also ABEND, ALC, BAL, Big Red Switch, HCF, mode bit, PL360, PL/S.