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An early public use of the acronym DASD is in IBM's March 1966 manual, "Data File Handbook. [7]" The earliest non-IBM use of the acronym DASD found by the "Google ngram viewer" to refer to storage devices dates from 1968. [8] From then on use of the term grew exponentially until 1990 after which its usage declined substantially. [9]
One or two DASD adapters are available (depending upon model) for attachment of one 3340 A-unit and with up to three additional 3340 or 3344 B-units providing up to eight devices. String Switch feature in the 3340 A-unit allows sharing of 3340/3344 DASD with another IBM processor or director that supports the A-units and string switching. [28]
It sells performance auto parts, aftermarket accessories, tools, and race apparel. JEGS was founded by Jeg Coughlin Sr. in 1960 as a small speed shop. [1] Jeg's remained family owned and operated until 2022 when a majority stake of the company was purchased by Greenbriar Equity Group .
All the preceding DASD models are equipped with a large AC motor, driving the HDA with a belt; however, the 3390 HDA is directly driven by a DC motor that is included in the enclosure. The 3390 Model 9 was the last Single Large Expensive Disk (sometimes called SLEDs) drive announced by IBM.
In the 1980s, Amdahl entered the IBM-compatible peripherals business in front-end processors and storage products, shipping its first 4705 communications controller in August 1980 and its first 6000 DASD in August 1982. [18] These products were very successful for a number of years with the support of Jack Lewis, the former CEO of Amdahl.
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During World War I Douglas was a major motorcycle supplier, making around 70,000 motorcycles for military use. In a 1916 review of flat-twin engines in Motor Cycle magazine [8] two models of Douglas engine are listed. The 2.75 hp (350cc) with 60.5mm bore and 60mm stroke, with the valves placed side-by-side on the side of the engine.
A single cycle processor is a processor that carries out one instruction in a single clock cycle. [1] See also. Complex instruction set computer, a processor ...