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Ryan 11th B

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Ryan 11th B

1. 1. Abacus It was invented about 3000 B.C. It consists of beads divided into 2 parts which are movable on the 2 rods. It is mainly used to calculate addition and multiplication by using the place value of the digit.
2. 2. Napier’s Logs and Bones Invented by John Napier who developed the idea of logarithms. It is used to perform addition multiplication and division. Due to the idea of logarithm developed in 1614, the tedium of repetitive calculations reduced.
3. 3. Pascal’s Adding Machine Invented by Blaise Pascal. Also known as Pascaline. It consists of numbers toothed wheels having unique position values. It was capable of doing additions and subtractions.
4. 4. Leibnitz’s Calculator Invented by Gottfried Leibnitz a German mathematician . It was able to perform multiplications and divisions & multiplications through repeated addition. Leibnitz’s machine used stepped cylinder each with 9 teeth of varying lengths instead of wheels used by Pascal.
5. 5. Jacquard’s Loom Invented by Joseph Jacquard. He manufactured punched cards at the end of the American Revolution. It was completely automatic and controlled by the process called weaving.
6. 6. Babbage’s Difference Engine Developed by Charles Babbage. It was able to perform mathematical functions and calculate logarithmic tables. Its operation was automatic, multi stop operations.
7. 7. Babbage’s Analytical Engine Designed by Charles Babbage. It was able to perform all four mathematical operation, along with comparison. It was included with the concept of central processor, storage area, memory, input and output devices.
8. 8. Hollerith’s Machine Invented by Herman Hollerith It was the first electro mathematical punched-card tabulator that used punched cards for input ,output and instructions. It was used by the American Department
9. 9. Mark - I It was invented by Professor Howard Aiken. It could multiply any two ten digit numbers in 5 seconds which was a record at that time. It was the first machine which could perform according to pre programmed instructions automatically without any manual interface.
10. 10. By :- Burhanuddin Jitesh Pravin Shivam Soubhik