Computer
Computer is a
programmable machine .It responds to a specific set of instruction in
well-defined manner .It can execute a prerecorded list of instructions (program
).Computers are now affecting every
sphere of human activity and bringing about many changes in industry
,government ,education ,medical ,scientific and even in arts like music and
painting.
‘Data’
is
information in a form that a computer can understand .
‘Instructions’
are
set of commands given to a computer to perform a task.
Characteristics
of computer
High
Speed:-Computers can perform complex
calculations in seconds where as if the same task is done manually it
might take hours
Storage
:-A
computer can store a large amount of data in a small space and retrieve the
information instantly and correctly when desired
Accuracy
:-Human
beings can commit errors but computers ensure accuracy
Easy
to Handle:- computers just need a set of
instructions to work efficiently ;it makes working easier rather than doing a
huge amount of paper work .
Diligence
:- Being
a machine ,the computer never gets bored tired ,or loses or lacks concentration
etc
Logical
Decision :Computers can take logical
decisions as per the instructions provided to them
Reliability
:- Computers are very
reliable if you provide them correct instructions .However if you give them
wrong instructions then you cannot expect the correct output