ICDL. Module 1. Basic Concepts of Information Technology. Computer System. Types of Computer. Memory Storage & Computer Performance. Data Communication & Networks. Computer in Everyday Life. Health & Environment. Computer Ethics.
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Basic Concepts of Information Technology
Types of Computer.
Memory Storage & Computer Performance.
Data Communication & Networks.
Computer in Everyday Life.
Health & Environment.
Computer perform three main operations:
1) Receive input (Data raw facts).
2) Process it according to predefined instructions.
3) Produce output (information which is meaning data).
The term hardware refers to the physical components of your computer such as the system unit, mouse, keyboard, monitor… etc.
A person who uses the software on the computer to do some tasks.
A set of tools that are used to:
receive, process, store, retrieve, print
and transmit information in an electronic form. These forms can be: text, sounds, picture or video.
Do the same jobs as mainframe, but smaller scale. They are used by medium-sized companies for specific purposes, such as accounting.
Are high capacity, expensive, are used for research and weather forecasting, oil explorationand aircraft design.
Cheap and easy to use. Often used as stand-alone computers or in a network. May be connected to large mainframe computers within big companies.
A large Pc-type computer called a Server is connected to smaller PCs called Clients or Terminals, therefore it is unable to work independently.
It is small, briefcase-sized and portable. It is powerful as PC but more expensive.
It is hand-held computer, which is called a Notepad with small screen and keyboard. It performs some special functions and is considered to be cheap.
Personal Digital Assistants (PDA):
Are small pen controlled, handheld computer.
Can be used to send and receive faxes and E-mail, to write memos and to keep an appointment calendar.