Computer Science

Introduction to Computer.

Computer as we all know is an electronic device which is capable of accepting data which are raw facts, processing data, storing data and producing a meaningful output called information

There are several characteristics of computer of which some are: accuracy, consistency, reliability, versatility, completeness and so on.

Classification of Computer.

Classification by generations
Classification by sizes
Classification by types
Classification by purpose or function

Classification by Generations

First Generation
Second Generation
Third Generation
Fourth Generation
Fifth Generation

Classification by Sizes

Super computer
Mainframe computer
Mini computer
Micro computer

Classification by Types

Analogue computer
Digital computer
Hybrid computer

Classification by Purpose

General purpose computer
Special purpose computer

Data and Information.

Data are raw facts that are not meaningful to the user.

On the other hand, information is processed fact that is meaningful to the user.

Differences between Data and Information
Data	Information
They are raw facts	They are processed facts
They are not meaningful to the user	They are meaningful to the user
They are valueless	They are valuable

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