Do you know...?
1. How to differentiating various
communication device (old and new)
Communication is an information delivering process (message, news,
idea, or opinion) from one side to another. In the ways of human to communicate
always experience a development along with the development of the human’s
knowledge itself. Here is the history of
communication course from the old times up to now.
1. Various tribes in Africa used a sound of
wooden drum to send the message
2. The American native people used smoke to
send the message that can be seen in several miles away.
3. In the 18th century, the
wooden barriers on the high pole in French along the country sending a signal
up to hundreds of kilometers away.
4. Claude Chappe invented a semaphore system
in 1797 and now it still being used by Navy to send message among the ships. On
this left side are the pictures of semaphore.
5. In 1838, an American called Samuel Morse
invented a code in the form of long and short flashes of electric current lamp
which is usually called in a term of ‘period’ and ‘line’. This code can send
message through wire or light flash.
6. Around 1870s, a Scotland – Alexander
Graham Bell invented a telephone. The working principles of the telephone to
change the sound becoming an electric signal which is sent to the receiver
device hold by the other user. In 15 years period, there are almost some
140.000 telephone users in USA.
7. An Italian named Guglielmo Marconi
invented a radio or wireless electronic device in 1899. Radio station sends the
signal through invisible radio wave, and then it is received by antenna. A
Scotland – John Logie Baird invented a television in early 1926. The picture on
the television can spread through the air or wire. The wave is caught through
the air while the installation of cable TV uses a connection device.
8. Nowadays, using cell phone you can talk
with anyone practically wherever you are. Your voice is brought by radio wave
which is called a micro wave passing one antenna to another; it reaches the
telephone you connect it. Some antennas are in the outer space satellite.
2. Several devices of ICT?
Information and
communication devices are media of technology that can be used to deliver the
information. The devices of information are now very progressive. It is proved
that all of the human activities can be helped with devices like cell phone for
having a communication with each other even in a far place,
Computer is used to get information, and many
more. Here are some several devices of ICT.
-Cell phone
Cell phone is a
device used to communicate through audio wave and also being used to send
message.
Computer
A computer is a
general purpose device that can be programmed to carry out a finite set of
arithmetic or logical operations. Since a sequence of operations can be readily
changed, the computer can solve more than one kind of problem. And we can
search for information through the internet in computer
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