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Things You Thought You Knew – Magnetic Cores & Flipping Poles
StarTalk Radio
How to Dial a Phone Number Without Dialing a Telephone Operator
4min Snip
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Before a certain time, if you see phone numbers in old timey TV shows, they only gave seven numbers. So this is a big advance in people's ability to communicate without the help of a telephone operator. Chuck worked for AT&T Bell Labs when he was in college at a summer internship there.
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