SS1 First Term Data Processing Lesson Note – Classification of Computers

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WEEK  6

TOPIC:  CLASSIFICATION OF COMPUTERS

CONTENT: 

1. Classification by type
2. Classification by size
3. Classification by Functionality (purpose)

SUBTOPIC 1: Classification by type

CLASSIFICATION OF COMPUTER BY TYPES

When computers are classified according to type, three different groups or classes of computers are recognized. They are the digital analogue and hybrid computer.

DIGITAL COMPUTER

This is most common type of computer today. It is used in processing discrete data that have to do with counting. Digit is a number therefore; digital computers measure physical quantities by counting. Most applications of computer have to do with data processing. As such, the digital computer is so much in use. Many modern devices are now using digital system. Examples of such devices are: calculator, digital wrist watches, digital fuel dispenser etc.

ANALOGUE COMPUTERS

Analogue computer processes continuous data such as speed, temperature, heartbeat etc. They are mostly used in scientific measurement which may require the processing of continuous data. These are the type of specialized computers you are likely to see in the hospitals connected to patients.

HYBRID COMPUTER

This type of computer combines the features of digital and analogue computers together. It can count and as well as measure.

SUB-TOPIC  2

TYPES OF MICRO-COMPUTERS

Micro computers came in different sizes ranging from desktop, laptop, palmtop, notebook computers etc.

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