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IBM Personal Computer models Type IBM P/N Date announced Date withdrawn Bus No. of slots No. of bays Processor Clock speed (MHz) Stock onboard RAM (KB) Maximum onboard RAM (KB) FDD HDD Notes Ref(s). Personal Computer: 5150-001 August 1981: March 1983: ISA, 8-bit 5 2 Intel 8088: 4.77 16 KB 64 KB none none
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 ...
The IBM Personal Computer XT (model 5160, often shortened to PC/XT) is the second computer in the IBM Personal Computer line, released on March 8, 1983. [1] Except for the addition of a built-in hard drive and extra expansion slots, it is very similar to the original IBM PC model 5150 from 1981.
The original IBM PC (Model 5150) motivated the production of clones during the early 1980s. IBM decided in 1980 to market a low-cost single-user computer as quickly as possible. On August 12, 1981, the first IBM PC went on sale. There were three operating systems (OS) available for it.
When the IBM PC was introduced in 1981, it was originally designated as the IBM 5150, putting it in the "5100" series, though its architecture was unrelated to the IBM 5100's. [4] The 5100 was IBM's second transportable computer. Previously, a truck-based IBM 1401 was configured in 1960 for military use and referred to as a mobile computer. [5]
The IBM Portable Personal Computer 5155 model 68 is an early portable computer developed by IBM after the success of the suitcase-size Compaq Portable. It was released in February 1984 and was quickly replaced by the IBM Convertible , only roughly two years after its debut.
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After IBM introduced the IBM PC, it was not until 1984 that IBM PC and clones became the dominant computers. [4] In 1983, Byte forecast that by 1990, IBM would command only 11% of business computer sales. Commodore was predicted to hold a slim lead in a highly competitive market, at 11.9%. [5] Around 1978, several 16-bit CPUs became available.
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