What is ICT?: Information and Communication Technology
It is the use of computer, radio, telephone, satellite and other communication technology in the practical world of business.
TYPES OF ICT
TELECOMMUNICATION: This is the technology of sending signal, images and messages over a long distance by radio, television etc.
DATA NETWORK: It is the inter-connectivity of all data networking or configuration. It makes data available to the users.
INFORMATION: These are the processed data made available to users.
SATELLITE: Satellite is an electronic device that is sent into space and move round the earth or another planet.
COMMUNICATION: It is the process of sending and receiving information. It is the interchange of thought through a particular medium.
EXAMPLE OF BROADCASTING MEDIA
EXAMPLES OF TELECOMMUNICATION
1) Public switched Telephone Network System
2) Mobile phone system
3) Circuit switched packet system
4) Satellite telephone system
5) Fixed wireless system
EXAMPLES OF DATA NETWORK
1) Personal Area Network (PAN)
2) Local Area Network (LAN)
3) Metropolitan Area Network (MAN)
4) Wide Area Network (WAN)
EXAMPLES OF INFORMATION SYSTEM
1) Data processing system
2) Global positioning system
TYPES OF NETWORK
1) LAN: LAN is a group of computer and other devices connected by a communication link over a relatively limited area so they can interact with any other computer on the network.
2) METROPOLITAN AREA NETWORK (MAN): It is a network that connects two or more Local Area Network (LAN) together but does not extend beyond the boundaries of the immediate town or city.
3) WIDE AREA NETWORK: WAN is a network that covers a very long distance and often uses facilities to pass information.
APPLICATION AREAS OF ICT
1) TELECONFERENCING: It is a conference or discussion at which members are in different places and speak to each other simultaneously using phone.
2) VIDEO CONFERENCING: It is a conference or discussion in which members are at different place and speak to each other simultaneously through video.
3) TELECOMMUNICATING: It is to work from home communicating with your office, customers and others by telephone, email etc.
4) TELECOMPUTING: It is the act of communicating from a distance place through the use of computer.
5) MESSAGE RETRIEVAL AND ARCHIVAL: This is a means of recovering a message based on that of historical nature and backing them up in an archive for safe keeping and referencing such as document of government, family, places etc.
ICT BASED GADGETS AND THEIR OPERATION
1) Mobile Phone Computer: It is an electronic device containing a receiver and transmitter that is connected to a telecommunications system, which allows the user to speak to and hear others with similar equipment. Modern mobile phone can also send and receive data in the form of text.
2) Fax Machine: This is a document or image that is sent in digitized electronic form over telephone lines and reproduced in its original form on the receiving end.
3) Automated Teller Machine (ATM): Also known as Electronic Cash Machine. It enables customers to withdraw paper money and carry out other banking transactions on insertion of an encoded plastic card named ATM card.
4) Dispensing Machine: It dispenses items such as snacks, beverages, lottery tickets to it users upon inserting currency into the machine. A good example is the vending machine.
5) Point of Sale Machine: Point of Sale refers to spot or location at which transaction takes place. It is the point at which a customer makes a payment to the merchant in exchange for goods or services and an electronic receipt is issued.
6) Automated Cash Register: It is a mechanical or electronic device for registering and calculating transactions. It is attached to a drawer for storing cash and attached to a printer for generating receipt or invoice.
7) Radio Sets: Radio is the use of electromagnetic waves to transmit and receive information such as sound broadcasts or two-way communication, without the need for connecting wires.
8) Television Sets: Television is an electronic device for receiving images and sounds.