In technology, the term "open-source" signifies a type of software whose source code is freely available for use, modification, and distribution. This collaborative approach encourages community involvement and innovation, allowing developers to improve and share their contributions. Open-source software often leads to increased transparency, enhanced security, and lower costs for users, as there are no licensing fees. Examples include the Linux operating system and Apache web server. The open-source model has reshaped the software industry and fostered a culture of collaboration in the technology community.