Intro. & History of Computers.pdf

Computer Is an electronic device for storing and processing data - a programmable electronic device designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations. THE EVOLUTION OF COMPUTERS EARLY COMPUTING DEVICE AND T...

Computer Is an electronic device for storing and processing data - a programmable electronic device designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations. THE EVOLUTION OF COMPUTERS EARLY COMPUTING DEVICE AND THEIR INVENTORS WHAT DO EARLY PEOPLE USE IN COUNTING ? Stones Hands and fingers Sticks and Stones Knots 5000 YEARS AGO - ABACUS A device made up of rods of sliding beads mounted on a frame, made counting easier and faster. Because of this , the abacus may be considered the first computer. 1623 -CALCULATING CLOCK Was composed of rotating rods and gears on an upright frame. Wilhelm Shickard A German professor, invented what could be the first mechanical computer. This could perform basic addition and subtraction of up to six-digit numbers. 1642 - PASCALINE Had movable dials that could be turned by hand. Blaise Pascal French Mathematician, invented the calculating machine to help his father a tax collector, add and subtract large sequences of numbers. Perform addition and Subtraction 1694 - STEPPED RECKONER Using a system of wheels and drums Gottfried Wilhelm Leibnitz German Mathematician ❖ A calculating machine much more complex than the Pascaline. ❖ It could perform all basic Math operations: Addition, Subtraction, Multiplication, Division. 1790 -Jacquard Loom Machine used for weaving Joseph - Marie Jacquard French Inventor 1820 - ARITHMOMETER ❖ A machine capable of performing the four basic Math operations in a simple and reliable way. Charles Xavier Thomas de Colmar France ❖ FYI – It was so successful that even after100 years, the machine was still being sold. 1821 - DIFFERENCE ENGINE He proposed to build a mechanical device that could perform calculations and print results. Charles Babbage English Mathematician This would have been powered by steam. FYI : Babbage spent 10 years working on this, but in the end, he was forced to abandon it because of lack of funds. 1834 - ANALYTICAL ENGINE Charles Babbage “ Father of Computing” Lady Ada Augusta Lovelace “ The world’s first computer programmer” ❖ Wrote the program that would have been used for this computer. ❖ A Computer designed to carry out more complicated calculations. ❖ FYI: This computer was never been built 1890- Tabulating Machine ❖ record statistics by electrically reading and sorting punched cards ❖ Used for census Herman Hollerith American Inventor ❖ International Business Machines Corporation (IBM). Harvard - MARK I Howard Aiken built during World War II in the United States ❖ It took between three and six seconds to add two numbers ❖ It helped the Navy by computing tables for the design of equipment such as torpedos and underwater detection systems Grace Hopper Bug - computer defects ,referred to as a failure or a flaw in the software program Debugging - is the process of detecting and removing of existing and potential errors ENIAC - Electronic Numerical Integrator and Computer John Mauchly John Presper Eckert, Jr. *The first programmable general-purpose electronic digital computer, built during World War II by the United States *Designed specifically for computing values for artillery range tables