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The history of the personal computer as a mass-market consumer electronic device began with the microcomputer revolution of the 1970s. A personal computer is one intended for interactive individual use, as opposed to a mainframe computer where the end user's requests are filtered through operating staff, or a time-sharing system in which one large processor is shared by many individuals.
By 1982, Michael Dell observed that a personal computer system selling at retail for about US$3,000 was made of components that cost the dealer about $600; typical gross margin on a computer unit was around $1,000. [94] The total value of personal computer purchases in the US in 1983 was about $4 billion, comparable to total sales of pet food.
America's History (Henretta et al.) American History: A Survey ; American Passages (Ayers et al.) The American Pageant (Bailey et al.) The American People (Nash et al.) By the People ; The Enduring Vision (Boyer et al.) Give Me Liberty! Liberty, Equality, Power (Murrin et al.) Out of Many (Faragher et al.) A People and a Nation (Norton et al.)
The term computer remained one that referred to mostly women (now seen as "operator") until 1945, after which it took on the modern definition of machinery it presently holds. [ 44 ] The ENIAC (Electronic Numerical Integrator And Computer) was the first electronic general-purpose computer, announced to the public in 1946.
A human computer, with microscope and calculator, 1952. It was not until the mid-20th century that the word acquired its modern definition; according to the Oxford English Dictionary, the first known use of the word computer was in a different sense, in a 1613 book called The Yong Mans Gleanings by the English writer Richard Brathwait: "I haue [] read the truest computer of Times, and the best ...
A standard-sized area within a computer case for adding hardware (hard drives, CD drives, etc.) to a computer. dual in-line memory module (DIMM) A series of dynamic random-access memory integrated circuits. These modules are mounted on a printed circuit board and designed for use in personal computers, workstations and servers. Contrast SIMM ...
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On 17 November 1951, the J. Lyons company began weekly operation of a bakery valuations job on the LEO – the first business application to go live on a stored-program computer. [ i ] In June 1951, the UNIVAC I (Universal Automatic Computer) was delivered to the U.S. Census Bureau .