Introduction to Computing


Computer is an electronic device that perform computing
Operates under the control of instructions (Software)
Accept data as input.
Manipulate data as per instructions.
Generates information

Computer Characteristics

Computer can process data with amazing speed
Computer has no feelings.It will not lose interest.Very Low failure rate.
Produce accurate information when required.
Data storage
Computer can store huge amount of data.
It can communicate with other computers and devices.


The physical equipment in a computer are called hardware.


The set of instructions that operates various parts of the hardware

Input Devices

Hardware used to enter data and instructions from the user or outside environment.

Output Devices

Hardware used to produce data from the Computer or inside environment to the user or outside world.


A processor is the logic circuitry that responds to and processes the basic instructions that drive a computer.
A microprocessor is designed to perform arithmetic and logic operations that make use of small number-holding areas called registers. Typical microprocessor operations include adding, subtracting, comparing two numbers, and fetching numbers from one area to another. These operations are the result of a set of instructions that are part of the microprocessor design.

Storage Devices
Used to store data
Volatile memory
Non volatile memory
Primary storage
Secondary storage


It is the collection of raw facts,figures and symbols.


A computer manipulate/process data as per given instructions to prepare information.


It is organized, meaningful and useful data.

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