💻 Class 1 Computer – Chapter 2: Parts of a Computer
🔹 1. Introduction
A computer is made up of many parts that work together.
Each part has a different function — just like our body parts!
For example:
👀 Eyes help us see,
👂 Ears help us hear,
🧠 Brain helps us think.
👉 In the same way, a computer also has different parts like Monitor, CPU, Keyboard, and Mouse.
🔹 2. Main Parts of a Computer
There are four main parts of a computer:
🖥️ 1. Monitor
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Looks like a television screen.
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Shows pictures, videos, and words.
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It is called the “Visual Display Unit (VDU)”.
💡 Example: You can watch cartoons or draw pictures on the monitor.
🧠 2. CPU (Central Processing Unit)
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It is the brain of the computer.
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It controls all other parts of the computer.
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It helps the computer to think and work properly.
💡 Without CPU, a computer cannot work.
⌨️ 3. Keyboard
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Has many small keys on it.
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Used for typing letters, numbers, and words.
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It usually has 104 keys.
💡 Example: You can type your name using the keyboard.
🖱️ 4. Mouse
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A small device connected to the computer.
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Has two buttons and a scroll wheel.
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Helps to point, click, drag, and drop things on the screen.
💡 Example: You can open games or draw using the mouse.
🔹 3. Other Parts of a Computer
Besides the main parts, a computer also has some helping parts called Peripheral Devices.
| Part | Function |
|---|---|
| Speaker 🔊 | To listen to sounds or music. |
| Printer 🖨️ | To print pictures or documents on paper. |
| Scanner 📠 | To send pictures or documents into the computer. |
| Headphones 🎧 | To listen to sounds privately. |
| Microphone 🎤 | To record our voice. |
🔹 4. How the Computer Works
A computer works in three simple steps:
| Step | Process | Example |
|---|---|---|
| 1️⃣ | Input | We type or click using keyboard/mouse. |
| 2️⃣ | Processing | CPU thinks and works on the input. |
| 3️⃣ | Output | Monitor shows the result or picture. |
💡 Example:
If you type a name using the keyboard (input),
CPU processes it,
and the monitor shows the name (output).
🔹 5. Comparison: Computer Parts and Human Body
| Human Part | Computer Part | Work |
|---|---|---|
| Eyes 👀 | Monitor 🖥️ | See things |
| Brain 🧠 | CPU 🧠 | Thinks and controls |
| Hands ✋ | Keyboard/Mouse ⌨️🖱️ | Work and give input |
🔹 6. Safety Rules for Using a Computer
✅ Sit properly on a chair.
✅ Keep your hands clean.
✅ Do not press keys too hard.
✅ Do not touch wires or plugs.
✅ Keep food and water away from the computer.
✅ Shut down properly after use.
🔹 7. Fun Facts 💡
💻 The CPU is also called the brain of the computer.
📺 The monitor shows what the computer is doing.
🖱️ A mouse helps you to move things on the screen.
⌨️ The keyboard helps you type anything you want.
🎧 You can listen to songs and sounds using speakers or headphones.
🧠 Quick Revision Table
| Part | Function |
|---|---|
| Monitor | Shows pictures and words |
| CPU | Controls all parts |
| Keyboard | Used for typing |
| Mouse | Used for clicking |
| Printer | Prints documents |
| Speaker | Plays sound |
🧩 Exercise / MCQs
1️⃣ Which part of the computer looks like a TV?
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(a) Mouse
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(b) Monitor
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(c) CPU
✅ Answer: (b) Monitor
2️⃣ Which part of the computer is called its brain?
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(a) Keyboard
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(b) CPU
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(c) Printer
✅ Answer: (b) CPU
3️⃣ Which device helps us to type?
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(a) Mouse
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(b) Keyboard
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(c) Monitor
✅ Answer: (b) Keyboard
4️⃣ Which part is used to point and click?
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(a) Monitor
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(b) Mouse
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(c) CPU
✅ Answer: (b) Mouse
5️⃣ Which part gives sound?
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(a) CPU
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(b) Speaker
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(c) Keyboard
✅ Answer: (b) Speaker
✨ Summary
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A computer has many parts that work together.
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The main parts are — Monitor, CPU, Keyboard, and Mouse.
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It also has helping parts like Speakers and Printer.
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Each part has its own special work.
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We must use the computer carefully and safely.