Open Source is a pervasive concept that allows individuals to modify and share designs publicly, which is predominantly seen in the software industry but also extends to other fields. Originating in the 1950s and 1960s when universities shared software modifications freely, the open-source model has grown into a major movement supported by key players like the Apache Foundation, RedHat, MySQL, Linux, Google, Microsoft, and GitHub. Microsoft, once resistant, has embraced open-source by contributing to projects and acquiring GitHub. Developers are encouraged to open-source their projects for benefits such as a wider audience, community support, diverse collaboration, durability, and learning opportunities, with examples like TensorFlow, Android OS, and Kubernetes highlighting these advantages. The author, Precious Luke, emphasizes the long-term value of open-sourcing projects, noting how it supports the foundation of many cloud and web services.