Home
Who invented the automatic telephone exchange?

“Almon Strowger, an undertaker, invented the automatic telephone exchange in 1891, reportedly because he believed a rival's wife who was a switchboard operator was sending his customers to her husband.”

Reference: Britannica

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1) Nickel Cadmium (Ni-Cd) batteries were the standard technology for years, but are now out of date.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.

How many people use the internet?

About 5.5 billion people, roughly two-thirds of the world's population, use the internet, according to the International Telecommunication Union.

Another fact

“Almon Strowger, an undertaker, invented the automatic telephone exchange in 1891, reportedly because he believed a rival's wife who was a switchboard operator was sending his customers to her husband.”

More from this shelf

What are the different types of laptop batteries?

When did Alexander Graham Bell patent the telephone?

How many people use the internet?