System Unit – Basic 3 Computer Studies Lesson Note (First Term)

Inside the Computer Box

The system unit is the main box of a computer. It has important parts inside:

Parts Inside System Unit

• Motherboard – main board that connects everything

• Processor (CPU) – the brain that thinks

• RAM – helps remember things quickly

• Fan – keeps parts cool

• BIOS Battery – small battery that helps computer start

• Power supply – gives electricity to all parts

Think of it like a house with different rooms for different jobs!

Exercise 2: Match the parts:

• Brain of computer: _____
• Keeps computer cool: _____
• Main connecting board: _____