What is Computer

The term computer is
derived from the Latin term ‘ compute ’,
this means to calculate.
Computer can not
do anything without a Program.it
represents the decimal numbers through a
string of binary digits. The Word
'Computer'usually refers to the Center
Processor Unit plus Internal memory .
Computer is an advanced electronic device
that takes raw data as input from the user
and processes these data under the control
of set of instructions (called program) and
gives the result (output) and saves output
for the future use. It can process both
numerical and non-numerical (arithmetic
and logical) calculations.The basic
components of a modern digital computer
are: Input Device,Output Device,Central
Processor. A Typical modern computer
uses LSI Chips.
Charles Babbage is called the "Grand
Father" of the computer.The First
mechanical computer designed by charles
Babbage was called Analytical Engine. It
uses read-only memory in the form of
punch cards.
Four Functions about computer are:
accepts data Input
processes data Processing
produces output Output
stores results Storage
Input (Data):
Input is the raw information entered into
a computer from the input devices. It is
the collection of letters, numbers, images
etc.
Process:
Process is the operation of data as per
given instruction. It is totally internal
process of the computer system.
Output:
Output is the processed data given by
computer after data processing. Output is
also called as Result. We can save these
results in the storage devices for the future
use.