# Lesson Notes By Weeks and Term - Senior Secondary 1

Classification of computers I

Term: 1st Term

Week: 5

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 2 periods each

Date:

Subject:      Data Processing

Topic:-       Classification of Computers I

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

1. Discuss the classification of computers based on the type of data it can handle
2. Discuss the classification of computers based on their functionality

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, pictures, Data Processing for senior Secondary Education by Hiit Plc, WAPB Computer Studies for Senior Secondary I by Adekunle et al, On-line Materials.

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

 PRESENTATION TEACHER’S ACTIVITY STUDENT’S ACTIVITY STEP 1 INTRODUCTION The teacher reviews the previous lesson on the fourth and fifth generation of computers Students pay attention STEP 2 EXPLANATION He discusses the classification of computers based on the type of data they handle Students pay attention and participates STEP 3 DEMONSTRATION He discusses further the classification of computers based on their functionality Students pay attention and participate STEP 4 NOTE TAKING The teacher writes a summarized note on the board The students copy the note in their books

NOTE

CLASSIFICATION OF COMPUTERS

CLASSIFICATION OF COMPUTER BY TYPE

1. 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.

1. 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.

1. HYBRID COMPUTER

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

CLASSIFICATION OF COMPUTER BY FUNCTIONALITY

1. 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.

1. 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.

EVALUATION:    1. List the classification of computers according to                                          type

1. Explain the difference between the classifications of                    computer according to type.
2. What is the difference between general purpose                    computers and special purpose computers?
3. Give any two examples of general purpose computer.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively