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Introduction to Information Technology

Computer:
Computer is an electric device that takes INPUT from the user, processes it & displays the result on the screen in the form of OUTPUT
INPUT:
Input is the data that is entered by the user.
OUTPUT:
The processed form of data is called output.
DATA:
Raw facts & figures are called DATA.
Information:
Processed form of data is called information

http://it.gulgasht.com/data.JPG

A computer consists of two main things.

Hardware
Software

Software s/w :

Software is a set of Instructions that tells the computer, what to do.
Hardware h/w :
The physical part of Computer is called hardware.
Hardware tells the computer what to do.

Difference Between Software & Hardware
http://it.gulgasht.com/diff.JPG
Computer Literacy:
Computer literacy refers to the knowledge & understanding of computer & its users.
? A person is called computer Literate if he/she understands computer & its applications.
Information Technology:
Information Technology is the technology that merges computing with high speed communication links (Carry data, Sound & Video) to spread information from One place to another.
Communication:
Exchange of Ideas is called Communication.
Media:
Media is used to carry the data.
Types of Media:

Bounded or Guided Media.
Unbounded or Unguided Media.

Bounded Media:

Physical connection is necessary for bounded media (e.g.: Coaxial Cables)
Unbounded Media:
Physical connection is not necessary for Unbounded Media (e.g.: Infrared, Blue tooth)
Components of IT
There are two Major components of IT.
? Computers
? Communication Network