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Computer History Timeline www.eacademy.lk Computer History Timeline www.eacademy.lk www.eacademy.lk
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The Computer-Key Developments Abacus-calculating device(3000BC)
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Abacus- Is an ancient calculating device. First man made computing device. Is still being used in China, Russia and the Far-east countries for calculations.
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Pascaline-mechanical adding machine(1642)
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Pascaline- is a desktop mechanical adding machine. This was developed by Blaise Pascal.
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Punched cards-data storage(1800s)
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Punched cards- A card punched with holes in certain places that a computer can read data coded from the combination of holes. This was first used by Joseph Jacquard to automate his weaving factory.
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Babbage-Analytical engine(1830s) Free tutorials www.dailyict.com www.dailyict.com
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Analytical Engine- This was invented by Charles Babbage who is known as “the father of computers”. Designed to store one thousand 50 digit numbers for calculations and decisions.
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Hollerith - Tabulating machine(1890s)
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Tabulating machine- This was invented by Herman Hollerith to tabulate1890 US census (Poll) data. It was electrically powered and, used punched cards. Free tutorials and Free Courses www.eacademy.lk www.eacademy.lk
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Mark i-General purpose computer(1944)
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Mark i- This was invented in 1944 by Dr.Howard Aiken. The idea is based on programmable, general purpose computer.
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ENIAC-Electronic computer(1946)
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ENIAC- In 1946 John Mauchly and J.Presper Eckert introduced the ENIAC as an electronic computing machine.
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UNIVAC- US Census Department(1951)
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UNIVAC-(UNIVAC-i) It was developed and this is the first commercial computer which got large amount of public attention. UNIVAC Programming Team
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EDVAC (Electronic Discrete Variable Automatic Computer) Stored Program Concept(1951)
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IBM-701(1953)
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Apple II- First personnel computer(1977)
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IBM-PC (1981)
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Portable computers(1987)
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Multimedia Desktop Computers (199……) Free tutorials and Free Courses www.eacademy.lk www.eacademy.lk
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Thank You ! More Free Courses tutorials & eBooks visit today www.eacademy.lk www.eacademy.lk
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