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# History of the calculator

## on Oct 27, 2010

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## History of the calculatorPresentation Transcript

• History of the Calculator
Jake Klein
And
Patrick Witt
• First Calculators
The Abacus
One of the first calculators know to man
Appeared in Asia Minor 2500 years ago.
Memory Machine
Based off the human hand because there is 5 beads
http://www.xnumber.com/xnumber/mechanical3.htm
• Schickard’s Machine
Add and subtract 6 digit numbers
Created by Wilhelm Schickard in 1623
Used a wheel that would rotate one tenth of a full tern
http://www.xnumber.com/xnumber/mechanical2.htm
• Leibniz Stepped Drum
The first machine which could execute all 4 arithmetic functions
Created by Gottfried Wilhelm Von Leibniz in 1672
http://www.xnumber.com/xnumber/mechanical2.htm
This was a abacus but instead of using beads it was replace by a sliding bar
Created by J.L. Troncet in 1888
http://www.xnumber.com/xnumber/mechanical2.htm
• William Seward Burroughs
Created by William Seward Burroughs between 1880 and 1884
It included a full keyboard and printing skills
• Dorr Felt’s Comptometer
Created by Dorr E. Felt in 1886
Used a full keyboard which listed the numbers and by pushing the numbers and pulling the lever it would compute
http://www.xnumber.com/xnumber/mechanical3.htm
• The beginnings of the 10-key machine
Created by James I. Dalton in 1902
It had two rows of 5 digits in each
Not easy to use and was time manageable
http://www.xnumber.com/xnumber/mechanical3.htm
• The Victor Adding Machine Co.
Created by Carl Buehler in 1923
The first one used a full keyboard similar to the Comptometer
Later it was improved with printing capabilities
http://www.xnumber.com/xnumber/mechanical3.htm
• The First Mechanical Binary Computer
First Binary Computer
Its memory consisted of metal plates instead of memory chips
Consisted of 64 words in 3 storage blocks
http://www.xnumber.com/xnumber/mechanical3.htm
• The Curta, a Mechanical Wonder
Created by Curt Herzstark in 1943
It had a four function calculator close to the Guass
It is nicknamed the pepper grinder
http://www.xnumber.com/xnumber/mechanical3.htm
• Microprocessor
Created by Dr. Marcian "Ted" Hoff in 1970
The first one was a 4 bit microprocessor
This brought us to the calculators we know today
http://www.xnumber.com/xnumber/mechanical4.htm
• Timeline of Calculators
First Calculator
Modern Calculator
http://www.wired.com/reviews/product/texas_instruments_ti_89_tit
• Reference Page
Emotional Video Unity, . (2007). Square root of 2 on the pepper grinder. Retrieved from http://www.vidoemo.com/yvideo.php?i=aGFhQ29WcWuRpckdkNms&square-root-of-2-on-the-pepper-grinder
Redin, J. (2007, November 22). A Brief history of mechanical calculators. Retrieved from http://www.xnumber.com/xnumber/mechanical1.htm
Redin, J. (2007, November 22). A Brief history of mechanical calculators. Retrieved from http://www.xnumber.com/xnumber/mechanical2.htm
Redin , J. (2007, November 22). A Brief history of mechanical calculators. Retrieved from http://www.xnumber.com/xnumber/mechanical3.htm.
Redin, J. (2007, November 22). The Calculator and the birth of the microprocessor. Retrieved from http://www.xnumber.com/history_pages/history4.htm