1. The Computer: An Overview

A computer is an electronic device that accepts input, processes it according to a set of instructions (programs), and produces output.

Key Functions:

1. Input – Receives data from devices like keyboards, mouse.
2. Processing – The CPU performs calculations, logic operations, and data manipulation.
3. Output – Delivers results via monitors, printers, or other output devices.
4. Storage – Saves data temporarily (RAM) or permanently (HDD/SSD) for future use.

2. Main Parts of a Computer

A computer consists of several key components that work together to perform tasks efficiently.

A. Hardware Components

1. Central Processing Unit (CPU) – The "brain" of the computer that executes instructions.
2. Motherboard – The main circuit board connecting all components.
3. Memory (RAM) – Temporary storage for active programs and data.
4. Storage (HDD/SSD) – Permanent storage for files and software.
5. Power Supply Unit (PSU) – Provides electricity to all components.
6. Graphics Processing Unit (GPU) – Handles visual rendering (important for gaming and design).

B. Software Components

1. Operating System (OS) – Manages hardware and software (e.g., Windows, Linux, macOS).
2. Applications & Programs – Software for specific tasks (e.g., Microsoft Paint, Microsoft office, Web browsers like Google Chrome, Mozilla Firefox ).