Tim O'Reilly is an influential American publisher and technology advocate, best known for founding O'Reilly Media in 1983. His company has played a significant role in the development of the tech publishing industry, producing books and resources on programming, software development, and emerging technologies. O'Reilly is also recognized for coining the term "Web 2.0," which describes the shift towards user-generated content and social media on the internet. In addition to his publishing work, O'Reilly is a prominent speaker and thought leader in the tech community. He has been involved in various initiatives that promote open-source software and the sharing of knowledge. His contributions have helped shape the way technology is understood and utilized in modern society.