Draw the block diagram of a computer system and briefly explain the function of each of the main components.

A computer system is a complex combination of hardware and software components that work together to perform a wide range of tasks. The primary components of a computer system can be categorized into hardware, which includes the physical parts, and software, which refers to the instructions or programs that tell the hardware what to do. When discussing the main components of a computer system, it’s helpful to look at a basic block diagram that outlines how these components interact. Below is an explanation of the function of each of the main components, focusing on both the theoretical understanding and practical application of these components.

### Block Diagram of a Computer System

The basic block diagram of a computer system typically consists of the following major components:

1. Central Processing Unit (CPU)
   - The CPU, often referred to as the "brain" of the computer, is responsible for executing instructions from programs, performing calculations, and managing data flow within the system.
   - The CPU can be divided into two main units:
     - Arithmetic Logic Unit (ALU): The ALU is responsible for performing all arithmetic (addition, subtraction, etc.) and logical (comparison operations) operations. It is crucial for processing data and making decisions based on conditions defined by the software.
     - Control Unit (CU): The control unit coordinates all the activities in the computer system. It fetches instructions from memory, decodes them, and executes the commands, directing the flow of data to appropriate locations, like registers or memory.

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