The document provides a history of computers from ancient China to modern times. It describes the abacus used in ancient China, Pascal's development of the mechanical calculator in the 17th century, Leibniz's subsequent calculator, the punched card looms of Joseph Marie Jacquard in 1801, Charles Babbage's analytical engine in 1830, Herman Hollerith's census tabulating machine in 1884, the ENIAC, the first general-purpose electronic digital computer created during World War II, the development of the microprocessor by Ted Hoff and Federico Faggin in 1971, the Apple II personal computer created by Steve Wozniak in 1977, the introduction of IBM's personal computer in 1981, and the