Computer
A computer is an electronic data-processing machine that has three
components where the input and output may be digital or analogue and the
process would involve storage, control and arithmetical operations. A
computer differs from most other machines because it is versatile and not
restricted to doing one particular job.
Analogue computes are machines designed to work on data which is
represented by some physical quantity which varies continuously; for
example, the turning of a wheel or changes in voltage can be used as
input. They are thus said to be operating in real time because they
respond as things happen and are widely used for research in design where
many different shapes and speeds can be tried out quickly. A computer
model of a car suspension allows the designer to see the effects of
changing size, stiffness and damping.
WANs (Wide
Area Network). A good example of a network is the Internet, a network of
networks, which is used by more than 30 million persons.