Component

Definition: A component is a distinct, reusable part of a software system that performs a specific responsibility.
A component usually has a defined interface through which other parts of the system interact with it.

Examples:

1. A PaymentService component processes payments.
2. A React LoginForm component displays and handles login.
3. A database component stores and retrieves customer information.

Module vs Component

A simple way to remember it:

Module = organizational unit of code
Component = functional building block that interacts with other parts

For example:

E-commerce System
│
├── Payment Module
│   ├── Payment Component
│   ├── Refund Component
│   └── Invoice Component
│
└── User Module
    ├── Login Component
    └── Profile Component

The exact distinction can vary depending on the architecture/framework.

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