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Invented by: Unknown

Year: 3500 B.C
Materials: Wood
The chineses inovated.

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Invented by Wilhelm Schickard
Year: 1623
Materials: Wood, Iron, Gear Wheels

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Invented by Blaise Pascoal
Year: 1642
Materials: Wood, Iron, Gears Wheels
Has received the patent of the king of France for makes more Pascalines.

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Addition; 1:09 ; 1:44. Subtraction; 1:57 ; 2:36.

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Invented by: Gottfried Wilhelm Von Leibniz
Year: 1672
Materials: Wood, Iron, Gears Wheels, Hand Crank

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My Mechanical Calculator 'Leibniz' on SimplePlanes Simple Planes

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Invented by Philipp Matthäus Hahn
Year: 1774
Materials: Wood, Iron, Gears Wheels, Hand Crank.
Hanh was an engineer who was engaged in making watches and planetariums.

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Invented by: Thomas Colmar
Year: 1820
Materials: Wood, Iron, Gears Wheels, Hand Crank.
The first calculator to have great commercial success.

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Invented by Charles Babbage
Year: 1822
Materials: Wood, Iron, Gears Wheels, Hand Crank

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Invented by: Pehr George Scheutz and Edvard Scheutz
Year: 1854
Materials: Wood, Iron, Gears Wheels, Hand Crank
In 1856 the machine was purchased by Dudley Observatory at Albany, New York, USA

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Invented by: Charles Babbage and Ada Lovelace
Year: 1871

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The Babbage Engine: The Largest, Heaviest, Complexiest Mechanical Calculator!!!

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Invented by: William Seward Burroughs
Year: 1880

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Invented by: Curt Herzstark
Year: 1948

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This is what happens when you divide by zero

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This is what happens when you divide by zero

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This is what happens when you divide by zero on a mechanical calculator

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Manufactured by the Bell Punch Co. of Uxbridge
Year: 1961
Was the world's first electronic desktop calculator.
Materials: full-keyboard calculator with a 13-digit "Nixie" type tube display, and makes extensive use of cold-cathode vacuum tubes, and an "integrated circuit" of the vacuum tube.

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Manufactured by Friden Calculating Machine Company
Made in U.S.A
Year: 1965-1968
Uses a crt (Cathode Ray Tube) to display the contents of the four registers.

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Made in Japan
Year: 1970
The first calculator to use MOS LSI (Metal Oxide Semiconductor, Large Scale Integration) integrated circuits.
The first calculator to use a vacuum fluorescent display (VFD).

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Manufactured by HP
Made in U.S.A. & Singapore
Year: 1972

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http://www.mastermindabacus.com/history.html

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https://history-computer.com/MechanicalCalculators/18thCentury/Hahn.html

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https://lemelson.mit.edu/resources/william-seward-burroughs

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http://www.vintagecalculators.com/html/sumlock_anita.html

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Tout, N. (n.d.). Anita Mk VII, Retrieved on May 15, 2019, from
http://www.vintagecalculators.com/html/anita_mk_vii.html

Tout, N. (2002). Friden EC-130 & EC-132, Retrieved on May 15, 2019, from
http://www.vintagecalculators.com/html/friden_ec-130_-_ec-132.html

Tout, N. (2002). Sharp QT-8D "micro Compet", Retrieved on May 15, 2019, from
http://www.vintagecalculators.com/html/sharp_qt-8d.html

Tout, N. (2002). Hewlett Packard HP-35, Retrieved on May 15, 2019, from
http://www.vintagecalculators.com/html/hewlett_packard_hp-35.html

Anonymous, (n.d.). The Engines, Retrieved on May 15, 2019, from

https://www.computerhistory.org/babbage/engines/