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Histroy of computer lecture 2
- 1. Topic To be Presented History of Computers & Computing BY ENGR. FARHIN JAVED
- 2. HISTORY • One of the earliest machine designed and assist people in calculations was the Abacus which is still being used some hundred year after its invention. • In 1642 Blaise Pascal (French Mathematician) invented an adding machine based on mechanical gears in which numbers were represented by the cogs on the wheel.
- 3. Abacus
- 5. FATHER OF COMPUTER??? • English man Charles Babbage, Invented in the 1830. That is called Difference Engine. • It was modified in future due to some weak points it is called then Analytical Engine.
- 6. DIFFERENCE ENGINE • His Design contains the first key characteristics of modern computers • Input device • Storage for numbers waiting to be processed. • A processor or number calculator • A unit to control the task and the sequence of its calculations. • An output device.
- 8. ANALYTICAL ENGINE • The Analytical Engine was a proposed mechanical general-purpose computer designed by English mathematician and computer pioneer Charles Babbage. It was first described in 1837 as the successor to Babbage's difference engine, a design for a mechanical computer.
- 10. PUNCHED CARD • Dr Herman Hollerith developed the first Electro- mechanical punched card tabulator, which was driven by electricity and could sort and select data. • This invention open the gate of Modern data processing and Hollerith went on to find the Tabulating Machine Company , Which later become IBM (International Business Machine).
- 12. DEVELOPMENT • In 1936 Howard Aiken of Harvard University convinced Thomas Watson of IBM to invest 1 million dollar in the development of electromechanical version of Babbage’s analytical engine. • The Harvard Mark 1 is completed in 1944 and was 8 feet high and 55 feet long.
- 15. DEVELOPMENT • At about the same time (1930) John Atanasoff of State University and his assistant Clifford Berry built first digital computer. • ABC (Atanasoff Berry Comp) . • This machine was basically a small calculator.