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A calculator is a device for performing numerical calculations. The type is considered distinct from both a calculating machine and a computer in that the calculator is a special-purpose device that may not qualify as a Turing machine. Although modern calculators often incorporate a general purpose computer, the device as a whole is designed for ease of use to perform specific operations, rather than for flexibility. Also, modern calculators are far more portable than most other devices called computers, though many PDAs are comparable in size to handheld calculators.

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In the near past, mechanical and clerical aids such as abacuses, comptometers, Napier's bones, books of mathematical tables, slide rules, or adding machines were used for serious numeric work, and the word "calculator" denoted a person who did such work for a living using such aids as well as pen and paper. This semi-manual process of calculation was tedious and error-prone.

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RT @fundingpost: RT @GuyKawasaki: 100 calculators for entrepreneurs http://om.ly/dkYe
studentforcenow (studentforce) Tue, 05 Jan 2010 19:53:44 -0000
RT @fundingpost: RT @GuyKawasaki: 100 calculators for entrepreneurs http://om.ly/dkYe
Start 2010 off right! Visit www.acefitness.org/GetFit for free workouts, health & fitness tips, calculators, recipes & more.
acefitness (ACE Fitness) Tue, 05 Jan 2010 19:51:05 -0000
Start 2010 off right! Visit www.acefitness.org/GetFit for free workouts, health & fitness tips, calculators, recipes & more.
My school district wonders why are math scores are so low. Maybe because they don't let us use calculators?
SarahIsFresh (Sarah Ostrovsky) Tue, 05 Jan 2010 19:45:40 -0000
My school district wonders why are math scores are so low. Maybe because they don't let us use calculators?
Fuck you graphing calculators for costing $100+ how is that a reasonable price for a calculator?!
shakingmilk (Alisa) Tue, 05 Jan 2010 19:21:50 -0000
Fuck you graphing calculators for costing $100+ how is that a reasonable price for a calculator?!
Use of the Day: Lubricates stuck buttons on push-button calculators. Seriously, do those still exist? Ah, yes, High School #wd40
originalWD40 (WD-40 Brand) Tue, 05 Jan 2010 19:02:54 -0000
Use of the Day: Lubricates stuck buttons on push-button calculators. Seriously, do those still exist? Ah, yes, High School #wd40
...My opinion: start being more practical, trust me calculators wont disappear and after graduation I wont waste time doing any calculations
rivero2060 (Alfredo Rivero) Tue, 05 Jan 2010 19:00:12 -0000
...My opinion: start being more practical, trust me calculators wont disappear and after graduation I wont waste time doing any calculations

 
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