Assignment #7

Cellular phones (Mobile phone) 

 The evolution of the cellular phones! 

THE FIVE W's:

What: Cellular phones are for calling and receiving to the people out there. 

When: Specifically, handheld mobile phone. In 1973, mobile telephony was very limited to phones installed to cars and other vehicles. So, Motorola and Bell Labs raced to be first to produce a handheld phone. The race was ended on April 1973, when Martin Cooper, a Motorola researcher and executive made the first mobile telephone call from handheld subscriber equipment, placing a call to Dr. Joel S. Engel of Bell Labs!   

Where: Again, specifically, handheld mobile phone. It invented in Motorola's headquarter in Schaumburg, Illinois. From Motorola's headquarter's first ever call to Bell Labs in Berkeley Heights, New Jersey.  

Who: the first ever call was from Martin Cooper, a Motorola researcher and executive to Dr. Joel S. Engel of Bell Labs. 

How did this work: People receive the calls or call by over the radio link. Radio link is a link between 2 radio towers. An example, I call my friend, Kobe. The call will go to one of the towers then that tower will pass a call to other tower then itself will go straight to Kobe!  

A cartoon radio tower from Google Images 

-This invention helps the communication. I can just call you by a device. If this invention didn't invent yet. We will communicate like in 1950s. We would mail by envelope mails. We will have to wait the respond in weeks! 

-The elements of this invention. 3 elements! Time, a mobile phone call can up to 30 minutes due to the battery space. Sound, of course! ringtones, music, ringing. Light, the artificial light comes from the screen to help you see better in the dark. Even on the keyboards. 
Sources: 
1.) http://www.google.ca/imgres?imgurl=https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiLSb_mMynFMBQjeU5KakHAFx4KCLbfI_nN6K03YMDLsGF7eA0gatOax143MYHe-DeA7MUtPNCKHADwdTrFV-AQLwmijeT6jQ81KxzPwWYQno_oKinvbfO95oY7R6Tbh3W25WJoLCs4rRI/s1600/black%252Btower%252Bradio.gif&imgrefurl=http://cooljustice.blogspot.com/2012/01/3-black-tower-radio-show-interviews.html&usg=__j3VPbcDHi0VXOLgAyt9aSlR6J_w=&h=221&w=210&sz=3&hl=en&start=2&sig2=imeuteFlHY1N1g0DS1xS6w&zoom=1&tbnid=iYC0GalOvXAopM:&tbnh=107&tbnw=102&ei=TxWUUL6tG4bDyQGXpYC4Dg&prev=/search%3Fq%3Dradio%2Btower%26um%3D1%26hl%3Den%26sa%3DN%26gbv%3D2%26ie%3DUTF- 8%26tbm%3Disch&um=1&itbs=1

2.) http://en.wikipedia.org/wiki/Mobile_phone

3.) http://en.wikipedia.org/wiki/Martin_Cooper_(inventor)

4.) http://en.wikipedia.org/wiki/Motorola


5.) http://en.wikipedia.org/wiki/Bell_labs