Components of a Computer System

A computer system consists of several essential components that work together to perform tasks efficiently. The main components include:

1. 🖱️ Input Unit

• Accepts data and instructions from the user.

• Converts them into a format understandable by the computer.

• Sends the converted data and instructions to the system for processing.

2. 💾 Storage Unit

• Provides space to store data and instructions.

• Stores intermediate and final results.

• Ensures data is available for current and future operations.

3. 🧮 Central Processing Unit (CPU)

• Known as the brain of the computer.

• Performs all major calculations and logical comparisons.

• Controls and coordinates operations of other units.

🔹 Components of CPU:

Component	Function
ALU (Arithmetic Logic Unit)	Executes instructions, performs arithmetic (+, –, ×, ÷) and logical (<, >, =) operations.
CU (Control Unit)	Directs operations of all other components, manages data flow, and acts as the “central nervous system” of the computer.

4. ⚙️ Processor (Microprocessor)

• A single chip combining ALU and CU.

• Often referred to as the heart of the computer system.

• Determines the performance and speed of the PC.

• Speed is measured in Million Instructions Per Second (MIPS).

5. 🖥️ Output Unit

• Receives processed results from the computer.

• Converts coded results into human-readable form.

• Delivers the final output to the user or external devices.