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calculator

calculator or calculating machine,device for performing numerical computations; it may be mechanical, electromechanical, or electronic. The electronic computer is also a calculator but performs other functions as well.

Sections in this article:

Introduction
Mechanical and Electromechanical Calculators
Electronic Calculators
Bibliography

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved.

More on calculator from Infoplease:

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