Appeared about 5,000 years4 Jun 2015
Appeared about 5,000 years ago in Asia Minor www.youravon.com and is still used in some places up to now, can be regarded as the beginning of a computing machine. This tool allows users to perform calculations using sliding grains arranged on shelves sebuh. The traders in the past using the abacus to calculate trade transactions. www.youravon.com b. After nearly 12 centuries, emerged other invention in terms of computing machines. In 1642, Blaise Pascal (1623-1662), who at that time was 18 years old, discovered what he called a numerical wheel calculator (numerical wheel calculator) to help his father make tax calculations. This brass square box called Pascaline, used eight serrated wheel to add numbers to eight digits. This tool is a calculator tool based on number ten. c. In 1694, a German mathematician and philosopher, Gottfred Wilhem von Leibniz (1646-1716) improve Pascaline by creating a machine that can multiply. Just like its predecessor, this mechanical device works by using wheels serrations. d. Charles Xavier Thomas de Colmar invented machines that can perform four basic arithmetic functions. Colmar mechanical calculator, arithometer, presenting a more practical approach in the calculation because the tool can perform addition, subtraction, multiplication, and division.