This article discusses various aspects of open-source product development. The open-source business definition is the development of a product using components that are not restricted in their use by others. Open source is still novel in the world of mechanical engineering. In software, however, its influence has been quite pervasive, both at the corporate and individual levels. Influence of open source has begun to be felt in publishing, the sciences, and education. According to a professional mechanical engineer, an open-source low-emission car is another possible project. Samir Nayfeh, an associate professor of mechanical engineering at the Massachusetts Institute of Technology, briefly investigated open source in the late 1990s, and expects that it would appeal to buyers in markets like machine tools, where customers do not like being locked into a vendor. The current market penetration of open source owes a great deal to individuals who would participate for their own reasons, sometimes for a moral idea, or for inclusion in a community of their professional peers, or to develop better skills.