Calculator
Electronic calculator is a small electronic device, used the laptop for basic arithmetic operations and complex mathematical operations.
The creation of the first electronic calculator in solid-state 1960s, and take advantage of the long history of tools such as the abacus, developed around 2000 BC, and machine mechanical calculator, developed in the 17th century and has been developed in parallel with the days of analog computers.
The portable devices are available in the 1970s, especially after the invention of the microprocessor developed by the Japanese calculator company Intel Busicom.
Modern electronic calculators vary models, and give, and credit card-sized models of the strong office inexpensive with integrated printers. And it became popular in the 1970s as integrated circuits made their size and low cost. At the end of that decade, and the rate calculator reduced to the point where basic calculator was affordable to most and they became common in schools.
Included your computer and early Unix interactive calculator programs such as capital and private, and calculator functions are included in all PDA devices from almost kind (save the address book and dictionary devoted some devices).
In addition to the calculators for general purposes, there are those designed for specific markets; for example, there are scientific calculators which include trigonometric calculations and statistics. Some calculators even have the ability to do computer algebra. Graphic calculators can be used to graph functions defined on the real line, or higher dimensional Euclidean space. At present, basic and inexpensive calculators, but scientists and graphic models tend to be more expensive.
In 1986, calculators still accounts for about 41% of the general purpose hardware computing capacity of the world to get information. This drop is less than 0.05% in 2007 [1]
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