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The IBM Personal Computer, commonly known as the IBM PC, spanned multiple models in its first generation (including the PCjr, the Portable PC, the XT, the AT, the Convertible, and the /370 systems, among others), from 1981 to 1987. It eventually gave way to many splintering product lines after IBM introduced the Personal System/2 in April 1987.
The Personal System/2 or PS/2 is IBM's second generation [1] [2] of personal computers. Released in 1987, it officially replaced the IBM PC , XT , AT , and PC Convertible in IBM's lineup. Many of the PS/2's innovations, such as the 16550 UART (serial port), 1440 KB 3.5-inch floppy disk format, 72-pin SIMMs , PS/2 port , and VGA video standard ...
An assortment of IBM PS/2s in various form factors; from left to right: a Server 95, a Model 80, a Model 25, and a PS/2 E on top of a Model 56 and a Model 30 286. The Personal System/2 or PS/2 was a line of personal computers developed by International Business Machines Corporation (IBM).
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 IBM PC compatible de facto standard. Released on August 12, 1981, it was created by a team of engineers and designers at International Business Machines (IBM), directed by William C. Lowe and ...
In 1999, he was identified in CIO magazine as one of the people who "invented the enterprise". The Don Estridge High-Tech Middle School — formerly IBM Facility Building 051 — in Boca Raton, Florida, is named after him, and received Estridge's IBM 5150 [5] [6] personal computers from his family on the occasion of its dedication in 2004.
The IBM P75 supports up to 16 megabytes of Random-access memory through 4 SIMM slots on the motherboard, each of which can accept a 2 MB or 4 MB 70 nanosecond SIMM. The SIMM must be manufactured by IBM for the computer to accept them – non-IBM SIMMs or generic SIMMs that do not utilise the "presence detect" feature cannot be used unless modified.
On August 12, 1981, IBM released the IBM Personal Computer. [10] One of the most far-reaching decisions made for IBM PC was to use an open architecture, [11] leading to a large market for third party add-in boards and applications; but finally also to many competitors all creating "IBM-compatible" machines.
The Personal System/2 Model 80 (typeset on the badge as the Personal System/2 Model 80 386) is a high-end desktop computer in IBM's Personal System/2 (PS/2) family of personal computers. First released in July 1987, the Model 80 features the 32-bit Intel 386 processor running at a clock speed of 16 MHz.