# CLASSIFICATION OF COMPUTER BY TYPES

Subject :

### Computer Studies / Information Communication Technology ICT

Topic :

CLASSIFICATION OF COMPUTER BY TYPES

Class :

SS 1

Term :

FIRST TERM

Week :

Week 5

Reference Materials :  .

• ONLINE MATERIALS
• SCHEME OF WORK
• TEXTBOOKS

Instructional Materials :..

• Computer Studies
• Online Resources

Previous Knowledge :

The pupils have previous knowledge of

### HISTORY OF COMPUTERS

that was taught as a topic in their previous lesson

Behavioural Objectives :  At the end of the lesson, the pupils should be able to

• Mention the classifications of computers by functionality
• Explain the classification of computers by types
• List the classification of computers by types
• Explain the difference between the classifications of computers according to type.

Content :

### CLASSIFICATION OF COMPUTER BY TYPES

Computers can be classified by types into THREE major types. They are:

1. Analog Computers

2. Digital Computers

3. Hybrid Computers

#### ANALOG COMPUTERS

Analog computers are those that use a continuous range of values to represent information. They are used to measure and process analog signals such as sound, temperature, pressure etc. They are also used for scientific calculations. Examples of analog computers are: voltmeter, ammeter etc.

#### DIGITAL COMPUTERS

Digital computers are those that use a discrete set of values to represent information. They are used to process digital signals such as binary code. They are also used for mathematical and logical operations. Examples of digital computers are: personal computers, laptops, mainframe computers, supercomputers etc.

#### HYBRID COMPUTERS

Hybrid computers are those that use both analog and digital techniques to process information. They are used to process both analog and digital signals. Examples of hybrid computers are: medical imaging systems, weather forecasting systems, Global Positioning System (GPS) etc.

WEEK FIVE

TOPIC: CLASSIFICATION OF COMPUTER BY TYPES

Computers can be classified by types into THREE major types. They are:

DIGITAL COMPUTER

ANALOGUE COMPUTER

HYBRID COMPUTER

• DIGITAL COMPUTER

This is the most common type of computer today. It measures physical quantities by counting. Examples are calculator,digital wrist watches, digital fuel dispenser etc.

• ANALOGUE COMPUTER

This type of computer is used to measure and process continuous data such as speed, temperature, heartbeat etc. Examples are speedometer, thermometer etc.

• HYBRID COMPUTER

This type of computer combines the features of digital and analogue computers together. It is a combinations of digital and analogue computers.

EVALUATION

1. List the classification of computers according to type
2. Explain the difference between the classifications of computer according to type.
3.  What is a digital computer?

A digital computer is a computer that uses digital technology to store and process data.W

4. What are the examples of digital computers?

Some examples of digital computers include personal computers, mainframe computers, and supercomputers.

5. What is a hybrid computer

CLASSIFICATION OF COMPUTER BY FUNCTIONALITY

Classification of computer according to purpose can be grouped into two (2), namely:

1. General purpose computers
2. Special purpose computers

• SPECIAL PURPOSE COMPUTERS

These are computers designed solely to solve a restricted class of problem e.g computer for medical diagnosis, weapon guidance, traffic control, weather study and forecast etc.

• GENERAL PURPOSE COMPUTERS

These are computers designed solely to solve a vast variety of problems e.g it can be used for Word processing and at the same time used for graphics, database, spreadsheet etc.

GENERAL EVALUATION

1. What is the difference between general purpose computers and special purpose computers?
2. Explain the following: digital, analogue and hybrid computers.
3. Give any two examples of general purpose computer.
4. Mention classification of computer by purpose.

WEEKEND ASSIGNMENT

1. How many classifications of computers do we have?  A.  2    B.  4    C.   7  D.  3
2. The generation of computer that uses AI is     A. third   B.  second   C.  fifth    D.  first
3. ……..is the smallest and the most popular class of computers.  A.  Micro  B.  Mini   C.  Super   D.  Mainframe.
4. What type of computer combines both features of digital and Analogue computers?  A.  micro  B.  hybrid   C.  digital   D.  super
5. Computers designed solely to solve a restricted class of problem is called    A.  general purpose   B.  special purpose   C.  digital    D.  analogue

THEORY

1. List the classifications of computers according to type.
2. Explain the difference between the classifications of computers according to type.
3. What is a digital computer?
4.  What are the examples of digital computers?
5.  What is a hybrid computer?
6.  What are the advantages of digital computers?
7.  What are the disadvantages of hybrid computers?

Presentation

The topic is presented step by step

Step 1:

The class teacher revises the previous topics

Step 2.

He introduces the new topic

Step 3:

The class teacher allows the pupils to give their own examples and he corrects them when the needs arise

Conclusion :

The class teacher wraps up or conclude the lesson by giving out short note to summarize the topic that he or she has just taught.

The class teacher also goes round to make sure that the notes are well copied or well written. He or she does the necessary corrections when the need arises.