ICT


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

https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSrPlopWAjoAV9ueX33OVkxjnH331XJOsGCHd2n6TVHwPwpJ6mNfg
2.    The American native people used smoke to send the message that can be seen in several miles away.

https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcQZrcS_k8_Sz94K90t2yYksFm-Jc_zwBDNZ2__WW9S9Ux1oGpSJ
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.
http://www.jackson.army.mil/sites/garrison/images/5042/1/Signal-pole-climbers.jpg

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.
http://flagexpressions.files.wordpress.com/2010/03/semaphore-flag-codes3.jpg
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.
http://www.linguanaut.com/images/morsecode.png
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.
http://www.wired.com/images/article/full/2008/03/alexander_graham_bell_500px.jpg
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.
http://top-10-list.org/wp-content/uploads/2009/07/Guglielmo-Marconi.jpg http://www.xtimeline.com/__UserPic_Large/3049/ELT200711241529584631874.JPG
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.
http://asset2.cbsistatic.com/cnwk.1d/sc/35243696-2-460-0.gif

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.
http://1.bp.blogspot.com/-qUCtWqrA290/UHVH_SZR61I/AAAAAAAAAFc/xUdwjqGCQu4/s200/phone.jpg

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
http://4.bp.blogspot.com/-Hes9BB5qls0/UHVHzNJh01I/AAAAAAAAAEk/IpE-KeX4pbc/s200/computer.jpg   

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