Uses and Applications of Computers Computer Studies JSS 1 Third Term Lesson Notes

Subject: Computer Studies

Class: JSS 1

Term: Third Term

Week: 5

Topic: Uses and Applications of Computers

Sub-topic: Understanding the roles, advantages, and disadvantages of computers

Duration: 45 minutes

Behavioural Objectives:

  • Students will understand five uses and five application areas of computers.
  • Students will identify three advantages and three disadvantages of computers.

Key Vocabulary Words:

  • Computer, application, advantage, disadvantage, society, education, business, medicine, recreation.

Learning Resources and Materials:

  • Textbooks, notebooks, whiteboard, markers, projector.

Reference Books:

  • Lagos State Scheme of Work for Computer Studies, Grade 7.

Building Background / Connection to prior knowledge:

  • Review the previous lesson on computer uses and applications.
  • Ask students to share their experiences with computers.

Embedded Core Skills:

  • Critical thinking, communication, problem-solving.



  • Uses of Computer:
    1. Education: Helps in learning with CDs and interactive software 📚.
    2. Healthcare: Checks patients’ health parameters 🏥.
    3. Business: Assists in planning, forecasting, and managing operations 💼.
    4. Banking: Manages large transactions efficiently 💰.
    5. Engineering: Solves complex calculations and creates drawings 🛠️.
  • Application of Computers:
    1. Education: Used for Computer-Aided Learning (CAL) 📝.
    2. Personnel Administration: Maintains employee records 📊.
    3. Business: Supports planning and forecasting 📈.
    4. Medicine: Checks health parameters of patients 🩺.
    5. Recreational Activities: Provides entertainment through games 🎮.
  • Advantages of Computers:
    1. Speed: Performs tasks quickly ⚡.
    2. Storage: Stores large amounts of data 🗄️.
    3. Accuracy: Makes fewer errors than humans 🎯.
    4. Efficiency: Handles tasks that are difficult manually 🔄.
    5. Decision Making: Provides timely information for decisions 🤔.
  • Disadvantages of Computers:
    1. Costly: Expensive to buy and maintain 💸.
    2. Dependence: Relies on humans to input correct data 🤖.
    3. Job Loss: Can lead to unemployment in some professions 👨‍💼.
    4. Security: Prone to virus attacks and cybercrime 🛡️.
    5. Power Dependency: Requires electricity to function ⚡.




  1. Computer can be used in computer schools, hospitals, government offices.
  2. Computers are used for organizing data management and information.
  3. It enhances the learning process with interactivity e.g students’ compact disk.
  4. It aids communication system through e-mail, teleconferencing, telephone E-presence.
  5. It is also used for word processing i.e. used to write letters, memos and documents.
  6. Computers are used for graphical presentation such as production of all sorts of cards, letterheads calendars etc.
  7. It is used for fun, excitement and relaxation through computer games.
  8. It helps to plan schedule and control people resources and cost of project.


  1. Computer in education: they are used as teaching aids in CAL (Computer Aided Learning) or CAI(Computer Aided Instruction).
  2. Personnel administration: are required for the keeping of comprehensive records on employees.
  3. Computer in business: is used for planning and forecasting using simulated scenarios. For experience and solution.
  4. Medicine: used to check health parameters of patients.
  5. Banking: helps to solve large amount of bank dealings and operations.
  6. Engineering: complex calculations and drawings are easily tackled.
  7. Recreational activities: used for playing games for relaxation, fun and excitement.
  8. Computer in art and music: the use of AutoCAD(computer aided drawings; amateur and professional musicians can compose or play and refine existing musical composition on computer.


  1. Mention five uses of computer in the society.
  2. State five application areas of computers.


  1. Computers are fast.
  2. They have large storage facilities.
  3. Computers are very accurate.
  4. It performs more operations that can be effectively performed manually.
  5. Computer accommodates growth i.e enabling the organisation to move forward and compete effectively with other firms.
  6. Provides immediate access to data i.e providing customers and clients with immediate responses to inquire about services rendered.
  7. Assist with decision making i.e. delivering information n timely manner.


  1. Computer systems are very expensive and not everybody could afford to buy one.
  2. Computer is an electronic device that cannot think on its own i.e. garbage in garbage out (GIGO).
  3. It makes some professional jobless.
  4. Misuse of computer information can be extended to include computer crime
  5. The uses of computer are limited to availability of electric power
  6. Computers can easily be attacked by virus.
  7. The uses of computer are limited to professional or educated users.


  1. State five uses of computer.
  2. State five areas of application of Computer.
  3. State three for each the advantages and disadvantages of computer.


Modern Computer Studies by Victoria Dinehin pg 30-32


  1. GIGO means …….. a) Garbage in Garbage out. b) Garbage indoor Garbage outdoor (c) Gate In Gate out d) all of the above
  2. ………. is used for computer teaching aids. a)TAN b) CAN c) CAD (d) PAN
  3. Computer is used in ……. to check health parameters of patients. (a) medicine (b) school c) industry (d) factory
  4. Computers can be used for electronic advertising in form of electronic bill board a)true b) false c) none of the above (d) all of the above
  5. ……….is used for fun, excitement and relaxation. (a) computer game (b) word (c) graphic (d) excel


  1. State five uses of computer.
  2. State five areas of application of Computer.
  3. State three for each the advantages and disadvantages of computer.

Understanding Computers: Uses, Advantages, and Disadvantages

  1. Introduction (5 minutes):
    • Recap the previous lesson on computer uses and applications.
    • Explain the focus of today’s lesson: understanding the roles, advantages, and disadvantages of computers.
  2. Presentation (15 minutes):
    • Discuss five uses of computers in society.
    • Explain five application areas of computers.
    • Describe three advantages and three disadvantages of computers.
  3. Teacher’s Activities (10 minutes):
    • Lead a discussion on each point, encouraging student participation.
    • Clarify any questions or misconceptions.
  4. Learners’ Activities (10 minutes):
    • Students take notes and ask questions as needed.
    • Engage in discussions and share personal experiences related to computer usage.
  5. Assessment (5 minutes):
    • Ask students to name one use of computers in society.
    • Have students list two application areas of computers.
  1. What are five ways computers are used in society?
    • In schools, hospitals, government offices, for data management, and communication.
  2. Name five areas where computers are applied.
    • Education, personnel administration, business planning, medicine, banking.
  3. What are three advantages of computers?
    • Speed, large storage, accuracy.
  4. Why is immediate data access beneficial?
    • It helps customers get quick responses about services.
  5. Why are computer systems sometimes considered expensive?
    • Because not everyone can afford to buy one.
  6. What is GIGO and how does it relate to computers?
    • GIGO stands for Garbage In, Garbage Out, meaning bad input leads to bad output.
  7. How can computer misuse lead to crime?
    • By accessing and using information illegally.
  8. What is a limitation of computer use related to electric power?
    • Computers require electricity to function.
  9. Why is it mentioned that computers make some professionals jobless?
    • Because some tasks that were done manually can now be automated.
  10. What types of activities can computers be used for in art and music?
    • Drawing with AutoCAD and composing or refining musical compositions.
  11. In what ways do computers assist with decision-making?
    • By delivering information in a timely manner.
  12. What kind of calculations are easily handled by computers in engineering?
    • Complex calculations and drawings.
  13. Why are computers used in recreational activities?
    • For relaxation, fun, and excitement through games.
  14. What kinds of documents can be created using word processing?
    • Letters, memos, and documents.
  15. How do computers aid communication?
    • Through e-mail, teleconferencing, and telephone E-presence.

Evaluation Questions:

  1. What are three advantages of computers?
  2. Name one application area of computers in business.
  3. How does computer aid communication?
  4. List two uses of computers in hospitals.
  5. What is the main disadvantage of computer systems?
  6. Explain one use of computers in education.
  7. What are the limitations of computer use related to electric power?
  8. Define GIGO in the context of computers.
  9. Give an example of a recreational activity involving computers.
  10. How do computers assist with decision-making?
  11. Computers are used in ___________, hospitals, and government offices. a) schools b) parks c) restaurants d) cinemas
  12. Which technology enhances learning with interactivity? a) Books b) Television c) Students’ compact disks d) Radio
  13. What is NOT an example of a communication system aided by computers? a) E-mail b) Teleconferencing c) Postcards d) Telephone E-presence
  14. What type of processing involves using computers to write letters and documents? a) Data processing b) Word processing c) Image processing d) Video processing
  15. Which area of application involves using computers for planning and forecasting? a) Education b) Medicine c) Business d) Engineering
  16. What is a key advantage of computers? a) Slowness b) Small storage facilities c) Accuracy d) Limited operations
  17. Which disadvantage involves the high cost of computer systems? a) Dependence b) Job loss c) Expense d) Security
  18. What type of device is an analogue computer? a) Works on discrete data b) Works on continuous data c) Has limited storage d) Is very slow
  19. Which application area involves using computers for personnel administration? a) Medicine b) Banking c) Education d) Business
  20. Which type of computer is suitable for complex calculations and drawings? a) Digital computer b) Analogue computer c) Hybrid computer d) None of the above
  21. What does GIGO stand for in the context of computers? a) Good Input, Good Output b) Garbage In, Garbage Out c) General Information, Great Outcomes d) Giant Input, Giant Output
  22. Which area involves using computers to compose and refine musical compositions? a) Business b) Medicine c) Art and music d) Engineering
  23. What type of processing involves creating graphical presentations? a) Word processing b) Image processing c) Data processing d) Video processing
  24. Which application area involves using computers to solve large bank transactions? a) Education b) Medicine c) Banking d) Engineering
  25. What limitation of computers is mentioned regarding electric power? a) They are unaffected by power issues b) They rely entirely on solar power c) They require electricity to function d) They can function without electricity

Exploring Types of Computers: Digital, Analogue, and Hybrid Computer Studies JSS 1 Third Term Lesson Notes


  • Review key points covered in the lesson.
  • Provide feedback on student responses.
  • Encourage further exploration of computer technology outside the classroom.
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