key-driven calculator

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• Calculator — For mechanical precursors to the modern calculator, see mechanical calculator. For other uses, see Calculator (disambiguation). An electronic pocket calculator with a 7‑segment LCD display, that can perform basic arithmetic operations …   Wikipedia

• calculator — /kal kyeuh lay teuhr/, n. 1. a person who calculates or computes. 2. Also called calculating machine. a small electronic or mechanical device that performs calculations, requiring manual action for each individual opertion. 3. a person who… …   Universalium

• Mechanical calculator — An old Russian mechanical calculator. A mechanical calculator is a device used to perform the basic operations of arithmetic. Mechanical calculators are comparable in size to small desktop computers and have been rendered obsolete by the advent… …   Wikipedia

• Sumlock ANITA calculator — The ANITA Mark VII and ANITA Mark VIII calculators were launched simultaneously in late 1961 as the world s first all electronic desktop calculators. Designed and built by the Bell Punch Co. in Britain, and marketed through its Sumlock… …   Wikipedia

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• Pi — This article is about the number. For the Greek letter, see Pi (letter). For other uses, see Pi (disambiguation). The circumference of a ci …   Wikipedia

• computer — computerlike, adj. /keuhm pyooh teuhr/, n. 1. Also called processor. an electronic device designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations. Cf. analog… …   Universalium

• Apollo Guidance Computer — and DSKY Invented by MIT Instrumentation Laboratory Manufacturer Raytheon Introduced August 1966 …   Wikipedia

• Adding machine — See adding machine (disambiguation) for other uses of this term. An adding machine is a type of calculator, usually specialized for bookkeeping calculations.In the United States, the earliest adding machines were usually built to read in dollars… …   Wikipedia

• History of personal computers — This article covers the history of the personal computer. A personal computer is one which is directly used by an individual, as opposed to a mainframe in which the end user s requests are filtered through an operating staff, or a time sharing… …   Wikipedia

• printing — /prin ting/, n. 1. the art, process, or business of producing books, newspapers, etc., by impression from movable types, plates, etc. 2. the act of a person or thing that prints. 3. words, symbols, etc., in printed form. 4. printed material. 5.… …   Universalium