Good Essay

Topics: Telephone, Mobile phone, Satellite Pages: 2 (339 words) Published: April 7, 2013
For the better part of every day, we are communicating to and with others. Whether it's the speech you deliver in the boardroom, the level of attention you give your spouse when they are talking to you, or the look you give the cat, it all means something. -------------------------------------------------

all communication systems in the past and present use electronic code. bar post of course . telephone lines as well as email. send signals that represent a sound or letter. more recently people have started to use fiber optics which instead uses light to transfer the information. but nevertheless. its always either a 1, or a 0 (on or off). then the millions of these combine at the receiving end to create a letter or word or specific noise etc. -------------------------------------------------

a less in depth look however would show us that in the past post and mail where prominent. forms of messengers also, including humans, dogs, birds etc. fire or smoke signals could also count (they still resemble a sort of code which is decrypted to mean some word) then the telephone was invented which utilized electricity and was the first form of communication to use the in the mid-20th century DARPA started research on a special network which would eventually be utilized by CERN in the 80's and then become the internet in the early 90's. now e-mail, Facebook etc. can't forget mobile phones though which uses satellites . then you got satellite phones which solely use satellites around the earth's atmosphere, rather than the cellular mast's on the ground. -------------------------------------------------

the US. has recently implemented their own independent network for the government called 'the global information grid'. it uses super-fast fiber optics and satellite communications, basically for the transfer of intelligence and orders....
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