A more thorough explanation:

Definition: Open source refers to software that is freely available to use, modify, and distribute. It includes human-readable source code that can be revised by anyone.

Example 1: WordPress is an open source content management system that allows users to create and manage websites. Its source code is freely available, which means developers can modify it to create custom themes and plugins.

Example 2: Mozilla Firefox is an open source web browser that can be downloaded and used for free. Its source code is available for anyone to view and modify, which has led to the development of many different versions of the browser.

These examples illustrate how open source software allows for collaboration and innovation. Because the source code is freely available, developers can work together to improve the software and create new features. This can lead to a more diverse and customizable range of software options for users.