present-day mainframes such as the IBMSystem z machines use one or more custom microprocessors as their CPUs). Many microcomputers (when equipped with a keyboard
System 9000 (S9000) is a family of microcomputers from IBM consisting of the System 9001, 9002, and 9003. The first member of the family, the System 9001
the IBM PC: IBM 5100 (1975) IBM 5110 (1978) IBM 5120 (1980) IBMSystem/23 Datamaster (1981) Japan-only IBM PC variants: IBM 5550 IBM JX IBM PS/55 IBM Palm
The IBM Personal Computer (model 5150, commonly known as the IBM PC) is the first microcomputer released in the IBM PC model line and the basis for the