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When was the first coast-to-coast phone call made?

“The first transcontinental phone call was made in 1915, when Bell in New York called his old assistant Thomas Watson in San Francisco.”

Reference: AT&T

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What are the different types of laptop batteries?

There are currently three types of batteries commonly used to run people's laptops:
1) Nickel Cadmium (Ni-Cd) batteries were the standard technology for years, but are now out of date.

2) Nickel Metal Hydride (Ni-MH) batteries are a cadmium-free replacement for Nickel Cadmium.
3) Lithium Ion (Li-ion) is the battery you want for your laptop and is the current standard for portable power.

When did Alexander Graham Bell patent the telephone?

Alexander Graham Bell received his patent for the telephone on March 7, 1876.

Microwaves in U.S. households

In 1978, only eight percent of U.S. households had microwave ovens. As of 2006 over 80 percent have them.

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