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I am the tool, for inspiring...

I am the tool, for inspiring many. Buy me in the store, for not much more than a penny. Don't overuse me, or my usefulness will go, what am I? Do you know?

Correct answers: 24

The first user who solved this task is Chandu Rajyaguru.

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Mice and Light Bulbs

Q: How many mice does it take to screw in a light bulb?
A: Two, if they're small enough.

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Vannevar Bush

Died 28 Jun 1974 at age 84 (born 11 Mar 1890). American electrical engineer who oversaw government mobilization of scientific research during World War II. At the age of 35, in 1925, he developed the differential analyzer, the world's first analog computer. It was capable of solving differential equations. He put into concrete form that which began 50 years earlier with the incomplete efforts of Charles Babbage, and the theoretical details developed by Lord Kelvin. This machine filled a 20 x 30 foot room. He innovated one of the largest growing media in our time, namely hypermedia as fulfilled in the Internet with hypertext links.

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