COMPUTER HISTORY® By: Jake M. Mauleon
•500 BC the Abacus or the suan pan was the first mechanical computing device which are used by the Chinese.
•The Abacus was used as an ancient calculator. It helped businesses to perform mathematical calculations without using pen and paper
•1550 – The Napier’s Bones was developed by John Napier. •John Napier – known as the discoverer of logarithms.
•1673 • (also called as the Step Reckoner)•Gottfried Wilhelm Leibniz•Addition, subtraction, multiplication, and division
•1820•Charles Xavier Thomas de Colmar•A machine capable of performing the four basic math operations
•Can perform calculations and print results.•Babbage spent ten years working on the difference engine,
•1833•Invented by Charles Babbage/ •Lady Ada Augusta Byron•Known as the first lady computer programmer
•1884• Invented by Herman Hollerith •the machine was developed to help process data for the U.S. Census
TABULATING MACHINE