Free and Open-Source Software (FOSS) refers to software that is released under a license that allows users to use, modify, and distribute the software freely. This means that the source code of the software is available to the public, and users are free to modify the software to suit their needs.
FOSS is often created and maintained by a community of developers who contribute to the project voluntarily. Examples of popular FOSS projects include the Linux operating system, the Apache web server, and the WordPress content management system. FOSS can be used by both individuals and businesses, and it can be an attractive alternative to proprietary software for those who value transparency, flexibility, and community-driven development.