The main component of computer are:-

1. Input Device 

Input device is a device which is used to control all the signal that is send to a computer and convert the all data into digital form that is acceptable by the computer. The device which are used to send data to the computer are 

• Keyboard:- it Used to input text, numbers, and commands through keys.
• Mouse :- A pointing device used to select, drag, and click items on the screen.
• Scanner :- Converts physical documents and images into digital format.
• Microphone :-Records audio and sends it to the computer.
• Webcam :-Captures live video and images for video calls or recordings.

2. Output device 

The output device receive data from a computer device and convert the all digital information into human readable form for displaying or producing information.The device which are used to process data or display data to the computer are 

• Monitor:-  used to Displays visual output such as text, images, and videos.
• Printer :-  It is used Produces a physical copy (hardcopy) of digital documents.
• Speakers :-  Output audio like music, sound effects, and alerts.
• Projector :- Enlarges and displays the computer’s output on a screen or wall.

3. CPU

The full form of CPU is Central Processing Unit. It is called the Brain of a computer because it control everything Computer does. As per the instructions given by the program it fetches from the memory then perform the operation and produce output. The task perform by the CPU are

• ALU (Arithmetic Logic Unit) :- Performs all arithmetic operations (add, subtract) and logic operations (compare, AND, OR).
• CU (Control Unit) :- Controls and coordinates all hardware operations and program execution.
• Registers :- Temporary storage areas inside the CPU for quick data access.

4. Computer Memory 

As the name suggests computer memory used to store data and instruction. Basic units of memory, are called bits. A 4-bit word is called a Nibble.