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Pager
It is a wireless telecommunications device that allows you to receive text messages or voice messages. The pager was very famous because was cheap, now is very useful in the hospitals because send messages very fast and because is more portable and smaller than a cellphone -
Optical Fiber
Was devised by Dr. Narinder S. Kapany in London.
It was used to transmit telephone communications from one city to another, they were cheaper and they were immune to electronic interference. -
Communications Satellite
They are used to emit radio and television signals from some areas of the Earth to others. The Telstar was the first communication satellite, the same successfully transmitted the first television images through space -
Electronic Mail
Is a network service that allows users to send and receive messages through electronic communication networks. By email you can send all kinds of digital files but with megabyte limitations. It is considered the most effective and fastest means of communication -
Cell Phone
It is a wireless means of communication through electromagnetic waves, is a portable telephone that can make and receive calls. Used to speak from anywhere with another person. The first cell phone was invented in 1973 by Motorola. It is the best-selling and most-used item of all time. -
Cable TV
It is a television system that is offered through radio frequency signals that are transmitted to televisions through fiber optic networks. Cable television can also provide telephone services and Internet access. Bell Telephone carried out the first transmission of television signals. Cable TV is rated as the most interesting distraction method -
Social Networks
They are web page where Internet users exchange personal information and multimedia content in order to create a virtual and interactive community of friends. The first social network was SixDegree, after this they started to create social networks like myspace, facebook, hi5, etc. Social Networks is the easiest method to exchange information. -
Wifi
Wifi is a wireless communication technology that allows electronic equipment, such as computers, tablets, smartphones or cell phones, to be connected to the internet, using radio frequencies or infrared for the transmission of information. It is the most important and used method to enter the Internet
