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Abacus to ENIAC: Highlights in the History of Computing
Brief timeline listing important events in the development of computing devices, ending in 1946 when ENIAC (Electronic Numerical Integrator and Computer), the first general-purpose electronic computer, was unveiled. Computing devices include the abacus, the quipu, Blaise Pascal's invention of an adding machine in 1642, Joseph Marie Jacquard's work on an automatic loom using punch cards in the early 1800s, and more. From PennPrintout, The University of Pennsylvania's Online Computing Magazine.
http://www.upenn.edu/computing/printout/archive/v12/4/abacus.html
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