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Unit-1: BASICS OF INFORMATION TECHNOLOGY
BASICS OF 1
INFORMATION TECHNOLOGY
With the advent of computers, extraordinary development has taken place in the field of
information and communication technologies, which has given rise to the era of Information
Technology (IT).
Information Technology has led to the establishment of a global network and has brought people
from different corners of the world to connect with each other. It allows anytime anywhere access
and instant sharing of data/information. IT has laid a great impact on our society.
Information Technology is the use of computers to gather, process, store, protect and transfer
information. Modern computers are a storehouse of augmenting information.
‘A computer is an electronic device that performs numerical calculations (+,-, *, /) and logical
operations (AND, OR, NOT) at high speed and produces information that is expressible in numerical
as well as in logical form’.
A computer is an electronic machine that accepts data and processes it to produce meaningful
results and accomplish various tasks.
DESIGN OF COMPUTER
A computer performs actions and accomplishes its tasks in three basic stages, namely: input,
process, and output. It works according to a set of pre-defined instructions known as programs.
A program is a set of sequentially arranged instructions that directs the computer to process the
input in order to produce the required output or result.
Basics of Information Technology 11

