calculator

1. a device for performing mathematical calculations, esp an electronic device that can be held in the hand

2. a set of tables used as an aid to calculations

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

calculator

[′kal·kyə‚lād·ər]

(computer science)

A device that performs logic and arithmetic digital operations based on numerical data which are entered by pressing numerical and control keys. Also known as calculating machine.

calculator

bitty box

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

calculator

A machine that provides arithmetic capabilities. The most basic calculators add, subtract, multiply and divide. More advanced devices handle sines, cosines and other trigonometric functions. Whether mechanical or electronic, all calculators accept numeric input from dials, levers or a keypad. The results are displayed as mechanical digits on paper tape or on a screen, such as an LCD. Unlike computers, calculators perform a finite set of arithmetic functions, and they cannot handle text. See Comptometer.

The First Handheld

In 1967, Texas Instruments introduced the first handheld calculator. The opened unit in the picture shows the paper tape used as output. (Image courtesy of Texas Instruments, Inc.)

The Curta Pepper Grinder

Completed in a World War II concentration camp in the 1940s, Curt Herzstark was given permission to perfect the calculator he patented earlier. These mechanical marvels were used up to the 1980s for their accuracy and ruggedness in hostile conditions such as car rallies. The sliders on the side hold the number multiplied by the number of times the "grinder" on top is turned. The results appear on top as well. (Image courtesy of Clive "Max" Maxfield, www.clivemaxfield.com)

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