Definition of Computer : Computer is an electronic device that is
designed to work with Information.The
term computer is derived from the Latin term ‘computare’, 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:
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accepts data
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Input
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processes data
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Processing
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produces output
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Output
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stores results
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Storage
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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.
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