Classification of Computers Computer Studies JSS 2 First Term Lesson Notes Week 1

Computer Studies JSS 2 First Term Lesson Notes
Week 1: Revision on Classification of Computers

Subject: Computer Studies

Class: JSS 2

Term: First Term

Week: 1

Age: 12 – 13 years

Topic: Classification of Computers

Sub-topics:

• Sizes of Computers
• Generations of Computers
• Degree of Versatility
• Types of Computers

Duration: 40 minutes

Behavioural Objectives: By the end of the lesson, students should be able to:

1. Classify computers based on size, generation, versatility, and types.
2. Differentiate between the sizes of computers.
3. Identify the characteristics of different computer generations.
4. Explain the degree of versatility in computers.
5. List the various types of computers.

Keywords:

• Computer Classification
• Versatility
• Generations
• Types of Computers

Set Induction:

The teacher will begin by asking students to recall different types of computers they have seen and their uses. This will introduce the concept of classification.

Entry Behaviour:

Students are already familiar with the basic functions of computers and common types like desktops and laptops from previous classes.

Learning Resources and Materials:

• Charts showing different sizes and types of computers
• Pictures of computers from different generations
• A projector displaying types and sizes of computers

Building Background/Connection to Prior Knowledge:

Students have previously learned about computers, their uses, and the basics of input and output devices.

Embedded Core Skills:

• Critical thinking
• Digital literacy
• Observation skills

Learning Materials:

• Lagos State Scheme of Work
• Visuals showing types of computers and their generations

Instructional Materials:

• Charts and diagrams of different types of computers
• Examples of mini computers, mainframes, etc.
• Projector to show images of computers from various generations

Content:

1. Classification of Computers by Size:
   Computers can be classified according to their sizes as follows:
   • Supercomputers: The largest and most powerful computers used for complex tasks like weather forecasting and scientific research.
   • Mainframe Computers: Large and powerful, used by big organizations for bulk data processing.
   • Minicomputers: Medium-sized computers used in small businesses.
   • Microcomputers: Also known as personal computers (PCs), these are the most common and include desktops and laptops.
2. Generations of Computers:
   Computers have evolved over time, and they are classified into different generations based on the technology used:
   • First Generation (1940-1956): Used vacuum tubes, large and expensive.
   • Second Generation (1956-1963): Used transistors, faster and smaller.
   • Third Generation (1964-1971): Used integrated circuits (ICs), more reliable and energy-efficient.
   • Fourth Generation (1971-present): Uses microprocessors, much smaller and faster.
   • Fifth Generation (present and beyond): Based on artificial intelligence, still under development.
3. Degree of Versatility in Computers:
   Computers can be classified by their ability to handle different tasks:
   • General Purpose Computers: Can perform a wide variety of tasks, e.g., personal computers.
   • Special Purpose Computers: Designed for specific tasks, e.g., ATMs, digital cameras.
4. Types of Computers:
   Computers can be classified into different types based on their functionality:
   • Analog Computers: Used for measuring physical quantities like speed and temperature.
   • Digital Computers: Most common, they perform calculations and data processing using binary digits.
   • Hybrid Computers: Combines features of both analog and digital computers.

15 Fill-in-the-Blank Questions:

1. The largest and most powerful computers are called __________.
   a) Minicomputers
   b) Mainframe computers
   c) Supercomputers
   d) Microcomputers
2. __________ computers are used by large organizations for bulk data processing.
   a) Mainframe
   b) Super
   c) Mini
   d) Personal
3. __________ computers are the smallest and are also called personal computers.
   a) Mainframe
   b) Micro
   c) Super
   d) Analog
4. The first generation of computers used __________.
   a) Transistors
   b) Integrated circuits
   c) Microprocessors
   d) Vacuum tubes
5. __________ computers use microprocessors.
   a) First-generation
   b) Second-generation
   c) Fourth-generation
   d) Fifth-generation
6. The fifth generation of computers focuses on __________.
   a) Data processing
   b) Vacuum tubes
   c) Artificial intelligence
   d) Integrated circuits
7. Computers that are used for specific tasks are called __________ computers.
   a) General-purpose
   b) Special-purpose
   c) Super
   d) Personal
8. __________ computers measure physical quantities.
   a) Digital
   b) Analog
   c) Hybrid
   d) Special
9. Computers that combine features of analog and digital computers are called __________.
   a) General-purpose
   b) Hybrid
   c) Special-purpose
   d) Digital
10. The second generation of computers used __________.
    a) Vacuum tubes
    b) Transistors
    c) Integrated circuits
    d) Microprocessors
11. Mainframe computers are used in __________ organizations.
    a) Small
    b) Large
    c) Personal
    d) Medium
12. A __________ computer can perform a variety of tasks.
    a) General-purpose
    b) Special-purpose
    c) Analog
    d) Hybrid
13. The third generation of computers used __________.
    a) Transistors
    b) Integrated circuits
    c) Microprocessors
    d) Vacuum tubes
14. Minicomputers are __________ than mainframe computers.
    a) Larger
    b) Smaller
    c) Faster
    d) Slower
15. The fourth generation of computers uses __________.
    a) Vacuum tubes
    b) Transistors
    c) Microprocessors
    d) Integrated circuits

15 FAQs with Answers:

1. What is the largest type of computer?
   • Supercomputer.
2. What type of computer is used by large organizations for bulk data processing?
   • Mainframe computer.
3. What are the smallest computers called?
   • Microcomputers or personal computers.
4. What technology was used in the first generation of computers?
   • Vacuum tubes.
5. What technology is used in fourth-generation computers?
   • Microprocessors.
6. What is artificial intelligence in relation to computers?
   • It is the technology being developed for the fifth generation of computers.
7. What is a general-purpose computer?
   • A computer that can perform a wide range of tasks.
8. What is a special-purpose computer?
   • A computer designed to perform specific tasks.
9. What is an analog computer?
   • A computer that measures physical quantities.
10. What is a hybrid computer?
    • A computer that combines the features of analog and digital computers.
11. What technology was used in second-generation computers?
    • Transistors.
12. What type of computer can handle multiple tasks at once?
    • General-purpose computer.
13. What was the main technology used in the third generation of computers?
    • Integrated circuits.
14. How do minicomputers differ from mainframes?
    • Minicomputers are smaller and less powerful.
15. What generation of computers is focused on artificial intelligence?
    • Fifth generation.

Presentation:

Step 1: The teacher revises the previous lesson and asks students to recall the parts of a computer system.
Step 2: The teacher introduces the topic “Classification of Computers” and explains the classification by size, generation, versatility, and types.
Step 3: The teacher uses charts and diagrams to explain the sizes, generations, and types of computers.

Teacher’s Activities:

• Use visual aids to explain the classification of computers.
• Ask students to provide examples of computers they have seen.
• Ensure that students can differentiate between the types and generations of computers.

Learners’ Activities:

• Answer questions about the types and sizes of computers.
• Participate in discussions on the classification of computers.
• Take notes on the classification of computers.

Assessment:

1. What are the classifications of computers by size?
2. Name the four generations of computers.
3. Explain the term “degree of versatility” in computers.
4. What is a general-purpose computer?
5. Differentiate between analog and digital computers.

Conclusion:

The teacher summarizes the lesson by reviewing the classification of computers based on size, generation, versatility, and type. The class ends with a recap of key points, and students are encouraged to ask questions.

More Useful Links

• Components of a Computer System Computer Studies JSS 2 First Term Lesson Notes Week 2
• Understanding Hardware Components of a Computer Studies JSS 2 First Term Lesson Notes Week 3
• Types of Computer Software Computer Studies JSS 2 First Term Lesson Notes Week 4