Open-source software refers to computer software whose source code is made available to the public. This means that the original code, written by the software developers, can be viewed, modified, and distributed by anyone. Open-source software is typically developed collaboratively and transparently, allowing a community of developers to contribute to its improvement. This model encourages innovation, flexibility, and community-driven development.

Characteristics of open-source software:

• Accessibility
• Community Collaboration
• Transparency
• Licensing
• Innovation
• Customization
• Cost-Effective

Popular examples of open-source software include the Linux operating system, the Apache web server, the Firefox web browser, VLC Media Player, and the MySQL database.