What is Computer Hardware?

Computer hardware refers to the physical parts of a computer that can be seen and touched. It includes all electronic and mechanical components.

Input Devices

Input devices are used to enter data into the computer system.

Examples:

• Keyboard
• Mouse
• Scanner
• Microphone

Output Devices

Output devices show the result of processed data.

Examples:

• Monitor
• Printer
• Speaker
• Projector

CPU (Central Processing Unit)

The CPU is the brain of the computer. It processes all instructions and controls operations.

Parts of CPU:

• ALU - Performs calculations
• CU - Controls operations
• Memory Unit - Temporary storage

Storage Devices

Primary Storage:

• RAM
• ROM

Secondary Storage:

• Hard Disk
• SSD
• Pen Drive
• Memory Card

Motherboard

The motherboard is the main circuit board that connects all computer components together.

Power Supply Unit (PSU)

PSU supplies electricity to the computer and converts AC to DC power.

Working Process

Input → Processing → Output → Storage