The abacus, one of the earliest calculators dating back 2500 years to Asia Minor, was based on the human hand and used beads to perform calculations. In the 17th century, Wilhelm Schickard created a machine that could add and subtract 6-digit numbers using a rotating wheel. Gottfried Leibniz then developed the first calculator that could perform all four basic arithmetic functions using a stepped drum mechanism. Throughout the 19th and early 20th centuries, various inventors developed new calculating machines with full keyboards and printing capabilities to help with calculations in businesses. Konrad Zuse then created the first binary computer in 1936 using metal plates for memory instead of chips. This led to the development of the microprocessor and modern calcul

1. History of the Calculator
Jake Klein
And
Patrick Witt

2. 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 beadshttp://www.xnumber.com/xnumber/mechani
cal3.htm

3. 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

4. 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

5. Troncets or Slide Adders
• 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/mechanic
al2.htm

6. William Seward Burroughs
• Created by William Seward
Burroughs between 1880
and 1884
• It included a full keyboard
and printing skills
• Made for the financial
workers in businesses

7. 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
computehttp://www.xnumber.com/xnumber/mechani
cal3.htm

8. 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/mechani
cal3.htm

9. 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/mechani
cal3.htm

10. The First Mechanical Binary Computer
• Created by Konrad Zuse in
1936
• First Binary Computer
• Its memory consisted of
metal plates instead of
memory chips
• Consisted of 64 words in 3
storage blockshttp://www.xnumber.com/xnumber/mechani
cal3.htm

11. 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/mechani
cal3.htm

12. 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/mechani
cal4.htm

13. Timeline of Calculators
First Calculator
Modern Calculator
http://www.wired.com/reviews/product/t
exas_instruments_ti_89_tit

14. 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