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IBM Personal Computer. 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 ...
List of best-selling game consoles. Sony's PlayStation 2 is the best-selling game system overall with over 155 million units worldwide. [ 1] A video game console is a standardized computing device tailored for video gaming. The compact size of video game consoles allows them to be easily used in a variety of locations, making them portable. [ 2]
The first Airways and Air Communications Service (AACS) squadrons were formed on 1 June 1948, when the United States Air Force (USAF) discontinued the Army Air Forces Base Unit system while implementing the Wing Base reorganization (Hobson Plan). On 1 October 1948, active AACS squadrons were renumbered starting at 1900 when USAF required Major ...
3D rendering of a Cray-1 with two figures as scale. The Cray-1 was a supercomputer designed, manufactured and marketed by Cray Research. Announced in 1975, the first Cray-1 system was installed at Los Alamos National Laboratory in 1976. Eventually, eighty Cray-1s were sold, making it one of the most successful supercomputers in history.
When b is 2, the unit is the shannon, equal to the information content of one "bit" (a portmanteau of binary digit [2]). A system with 8 possible states, for example, can store up to log 2 8 = 3 bits of information. Other units that have been named include: Base b = 3 the unit is called "trit", and is equal to log 2 3 (≈ 1.585) bits. [3] Base ...
A vacuum-tube computer, now termed a first-generation computer, is a computer that uses vacuum tubes for logic circuitry. While the history of mechanical aids to computation goes back centuries, if not millennia, the history of vacuum tube computers is confined to the middle of the 20th century. Lee De Forest invented the triode in 1906.
The 7090 is the fourth member of the IBM 700/7000 series scientific computers. The first 7090 installation was in December 1959. [ 1] In 1960, a typical system sold for $2.9 million (equivalent to $23 million in 2023) or could be rented for $63,500 a month (equivalent to $501,000 in 2023). The 7090 uses a 36-bit word length, with an address ...
The annual worldwide market share of personal computer vendors includes desktop computers, laptop computers, and netbooks but excludes mobile devices, such as tablet computers that do not fall under the category of 2-in-1 PCs. The global market leader has been Lenovo in every year since 2013, followed by HP and Dell.
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