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The original IBM Personal Computer, with monitor and keyboard. 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.
Products, services, and subsidiaries have been offered from International Business Machines (IBM) Corporation and its predecessor corporations since the 1890s. [1] This list comprises those offerings and is eclectic; it includes, for example, the AN/FSQ-7, which was not a product in the sense of offered for sale, but was a product in the sense of manufactured—produced by the labor of IBM.
Main memory, which was four-way doubleword interleaved, could be 1 to 8 megabytes, with offerings selectable in increments of one megabyte. [5] The Model 168 used semiconductor memory, rather than the magnetic-core memory used by the 370/165 [5] introduced 2 years prior, resulting in a system that was faster and physically smaller than a Model 165.
Initially, model 1 (4952, Model C), [4] model 3 (IBM 4953) and model 5 (IBM 4955, Model F [4]) processors were provided. Later processors were the model 4 (IBM 4954) and model 6 (IBM 4956). Don Estridge had been the lead manager on the IBM Series/1 minicomputer. He reportedly had fallen out of grace when that project was ill-received.
The original PS/1 (Model 2011), based on a 10 MHz Intel 80286 CPU, was designed to be easy to set up and use. It featured 512 KB or 1 MB of on-board memory (expandable to 2.5 MB with proprietary memory modules), built-in modem (in American models only) and an optional 30 MB hard disk. Later models had an optional 40 MB hard disk.
IBM claimed the XT/370 reached 0.1 MIPS (when the data fit in RAM). In 1984, the list price of an XT/370 in its typical configuration was approximately $12,000 so compared favorably with IBM's own mainframes on a $/MIPS basis; for example, an IBM 4341 delivered 1.2 MIPS for $500,000. While it theoretically reduced demand on customers ...
Bill of sale: The bill of sale is the receipt for the transaction. It should include the vehicle’s make, model and year, the VIN number, the sale price and the name and contact information of ...
The Equity was a reliable and compatible design for half the price of a similarly-configured IBM PC. Epson often promoted sales by bundling one of their printers with it at cost. The Equity I sold well enough to warrant the furtherance of the Equity line with the follow-on Equity II , [ 5 ] [ 6 ] [ 7 ] Equity III , [ 8 ] [ 9 ] [ 10 ] and others ...