Computer – An amazing machine


Computer – An amazing machine

Introduction:


In the past few decades, computers have greatly influenced the life style of a common man in the office, home , shopping center, library, theatre etc. Computers have solidly established itself as a powerful tool for helping the professionals/business people to improve their performance and the quality of their work.


It would be exciting to know what exactly a computer is?  What are its components? How does it work? What are the different species of a computer? Etc.

This book takes you to a marvelous journey to discover more about computers. Bon Voyage!


Computer is a truly amazing machine that performance a specified sequence of operations as per the set of instructions (known as programs) given on a set of data (input) to generate desired information (output). Being a machine,  it will not perform independently or creatively. It will do only, what it is instructed to do, in  specific terms. It is based on a complex technology.

Input----------- Process ------------Output


The following features characterize this electronic machine:



Sped
Accuracy
Storage and retrieval
Repeated Processing Capabilities
Reliability
Flexibility
Low cost


Overview of a Computer System


Every  computer  system has two main units:

1.      Hardware
2.      Software

All physical parts of the computer (or everything that we can touch) are as Hardware Software gives  intelligence  to the computer . For example in a television the wires, switches etc, are the hardware while the programs, watched on TV , is the Software.


Although the hardware of a computer is capable of performing marvelous tasks, it can’t actually accomplish any of them without the vital instructions that Software provides. In this section we’ll look at the physical components of the machine, the hardware & then turn to the software that brings life to the physical components.

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