INF 103 Computer Literacy
Maria J. Sinche-Quizhpi
February 25, 2013
-THE TYPES OF CONNECTION
-FACTORS AFFECTING CONNECTIONS
-MOBILE APPLICATIONS AND LIMITATIONS
Mobile Computing: is a generic term used to refer to a variety of devices that allow people to access data and information from where ever they are.
Mobile devices has improved throughout the past years. Laptops, tablets, IPods, cell phones, netbooks are some of the computer devices of mobile computing. Today, people have let these devices overtake the house desktops. I am mostly impressed on the growth and usage of cell phones. Everybody has a cell phone, and use it to communicate, text, search the web, and for entertainment. In the following essay I will briefly explain the birth of cell phones; year to present, its improvements, and its applications, I will also list some of the advantages and disadvantages a mobile phone have.
Mobile phones technology was born back in the 1900's. They were originally used in cars, airlines, and passenger trains. In 1921, mobile radios were installed in police squad cars, operating around 2 MHz. Due to overcrowding on the channels and terrible interference, in 1934 U.S. Congress were the ones to decide who gets to use certain radio frequencies. In 1940 The mobile radios were able to operate at 30 to 40 MHz, but only police departments and the rich were able to use it. In 1947 AT&T came out with the first radio car phones. Due to the great amount of interference in the system, AT&T's project failed.
In 1964, better operating systems were developed at 150 MHz on a single channel. Improved Mobile Telephone System Services (IMTS), were brought up in 1969. IMTS was a self dialing capability at 450MHz. In 1971 AT&T was the first company to introduce modern-day mobile-phone systems. In 1973 Dr. Martin Cooper invented the first personal handset while working for Motorola. His new invention,...
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