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William Oughtred was the inventor of the Slide Rule which allowed mathematical operations such as multiplication and division to be calculated by reading values from graduated scales. Slide rules were still commonly used in the 1970's and early 1980's but with the invention of modern electronic calculators, the use of the slide rule has declined.
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Who was the first person to use parallel symbol?
William oughtred
When did Oughtred invent the slide rule?
William Ougthered invent Slide Rule in 1622!
3 contributions to mathematics from Albert Einstein?
To bad those are all contributions to physics, not mathematics.
When was the slide rule invented?
AnswerThe slide rule was invented by William Oughtred in 1625. AnswerWe do not know the precise year. A circular slide rule was invented by William Oughtred some time about 1620, and a design of a similar slide rule by Delamain was printed in about 1630. The straight slide rule seems to have been invented later, some time around 1650.
Who first used the parallel symbol?
William Oughtred(1574-1660) was the first to use the symbol for parallel.
