important inventions of the 20th century

One of the most importasnt inventions of the twentieth century that revolutionized the world was the cellphone or mobile phone. The mobile phone was invented in the year 1977 by Martin Cooper. Cooper was also the first person to makea call andhe did it to his rival. The phone he talked by was called, "the Motorola dyna pack." This was a really big phone. The cellphones have evolutionized over the years. At the beggining the only features these phones had were to talk, listen and dial. Now they have a lot more features. For example blackberries can text, dial, call, listen, camera, video, bluetooth, games and a lot more.
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http://en.wikipedia.org/wiki/Mobile_phone '

It's amazing how much cellphones have advanced throughout the years. Every year they get smaller, more technological and more effective for the ones using them. I believe they are the biggest communication way right now and people are depending on them more every day.

The mobile is very important for communicating around the world, but humans are recently depending too much on it. Results show that being too much on a show damages your brain.

When Alexander Graham Bell created the first telephone there was only one in each town. If someone called and asked for you, then the person that picked up the phone would have to go looking for you. I think its important that Martin Cooper created the mobile telephone. Even though at the time they were big, but then people didnt have to share with the rest of the town. Now phone are really important, because we can always find people whenever we need to.

The cellphones were a really useful invention. Today everyone relies on it for work or just for entertainment. Sometimes cellphones are overused and it is said being around celphones affects your health.