Word: xiii
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Dates: during 1950-1959
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...Abacus. The calculating machines that are Bessie's ancestors have roots far back in the past. The abacus, used in ancient Egypt and still used in much of Asia, is a simple figuring device. The French mathematician Blaise Pascal (1623-62) designed a mechanical calculator when Louis XIII was king. The present adding machine is a remote descendant of Pascal's design...