Open Source refers to software that is freely available to the public, with its source code open for anyone to view, modify, and distribute. This collaborative approach allows developers from around the world to contribute to projects, enhancing the software's functionality, security, and performance over time. Open-source software is often developed in a community-driven manner, with contributions coming from volunteers, companies, and academic institutions. Examples of popular open-source projects include the Linux operating system, the Apache HTTP Server, and the Python programming language.

The open-source model promotes transparency, innovation, and cost savings, as users are not bound by expensive licensing fees or vendor lock-in. It also fosters a sense of community and shared responsibility, as developers work together to improve the software. However, open-source projects can vary in quality, and the lack of formal support can be a drawback for organizations that require stable, reliable solutions. Despite these challenges, open-source software has become a cornerstone of modern technology, driving innovation and enabling widespread access to powerful tools and platforms.