Introduction To Computers | Computer Hardware

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Definition of a computer

A computer is an electronic device which is capable of receiving the inputs (data from the user), storing it for a

desired period of time, manipulating it according to the set of instructions (called program) and producing the

output to the user in desired form. It performs a variety of operations in accordance to the set of instructions.

Also, Computer is an electronic because it contain some electronic component such as resistor, transistor,

capacitor and integrated circuits.

Your "computer" is a programmable electronic collection of devices that function as a unit which can store,

retrieve and process data. This collection includes a System Unit, a Keyboard, a Monitor and a Mouse.

2. Sysytem Unit

2.1. Computer Hardware

Introduction to Computer Hardware
A computer is an electronic device, operating under the control of instructions stored in its
own memory that can accept data (input), process the data according to specified rules,
produce information (output), and store the information for future use.
Characteristics of a Computer
High Speed
• Computer is a very fast device.
• It is capable of performing calculation of very large amount of data.
• The computer has units of speed in microsecond, nanosecond, and even the
picosecond.
• It can perform millions of calculations in a few seconds as compared to man who will
spend many months to perform the same task.
Accuracy
• In addition to being very fast, computers are very accurate.
• The calculations are 100% error free.
• Computers perform all jobs with 100% accuracy provided that the input is correct.
Storage Capability
• Memory is a very important characteristic of computers.
• A computer has much more storage capacity than human beings.
• It can store large amount of data.
• It can store any type of data such as images, videos, text, audio, etc.
Diligence
• Unlike human beings, a computer is free from monotony, tiredness, and lack of
concentration.
• It can work continuously without any error and boredom.
• It can perform repeated tasks with the same speed and accuracy.
Versatility
• A computer is a very versatile machine.
• A computer is very flexible in performing the jobs to be done.
• This machine can be used to solve the problems related to variousfields.
• At one instance, it may be solving a complex scientific problem and the very next