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21 Cards in this Set
- Front
- Back
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abacus
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the oldest tool used for computing
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antikythera mechanism
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used a system of gears; oldest scientific calculator
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sectors
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calculated basic arithmetic's, areas, volumes, and conversions
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the slide
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made with two bars with numbers that slid next to eachother
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Schickard's calculator
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the first known four way calculator; add, subtract, divide, multiply
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leibniz step reckoner
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base design for all calculators for 275 years
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curta calculator
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the smallest four way calculator before WWII
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arithmometer
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a version of the leibniz calculator that was sold in large quantities
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pinwheels
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used a system of pins and levers
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millionaire
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had an electric motor with 16 digits
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monroe LA5-160
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four functions with over 12,000 parts
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electric calculators
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beat out mechanical calculators
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first electric calculators
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were large and not convenient
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hand helds
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were small, inexpensive, and had digital screens
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pocket calculators
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were still expensive but fit into your pocket
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lord's calculator
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had very long, easy to read scales
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napier's bones
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reduced multiplication and division to simple addition and subtraction
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pascaline
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the first addition calculator to be produced in even small quantities
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the babbage engine
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a prototype of the first programmable computer, it was never finished
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comptometer
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the first calculator to use a keyboard
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burrough's adding and listing machine
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used a crank to print answers
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