Alex St. John
Alex St. John is a former Microsoft employee who started the development of DirectX and by some is considered the father of gaming on Windows. Notably, his work in this direction was heavily influenced by Doom, which by his account was a "religious phenomenon" at the Microsoft campus.
In 1995, Microsoft's focus was primarily "multimedia" -- essentially meaning video and educational material. Alex St. John however came to the insight "that the future of multimedia wasn't Encarta, it was DOOM"  and became "one of the leaders of the effort to make the company a player in gaming graphics."  A small group of developers, including St. John, subsequently developed WinG, "a video API that could run DOOM almost as fast under Windows as it did in DOS". WinG evolved into DirectX, which was used for the company's port of Doom, Doom95.
- Colayco, Bob and Kenn Hwang (7 March 2000). "Alex St. John Interview." FiringSquad (archived 🏛). Retrieved 18 March 2018.
- GameSpy Staff (25 July 2003). "DirectX Unites the World." GameSpy (archived 🏛). Retrieved 18 March 2018.
- Turner, Daniel Drew (15 May 2002). "Age of Nvidia." Salon.com (archived 🏛). Retrieved 18 March 2018.