Focus is a matter of deciding what things you’re not going to do.

Quote Author: , Nationality: , Sex: 

Profession(s)Businessman | Computer Programmer | Engineer | 

Born: August 20, 1970

John D. Carmack is an American computer programmer, engineer, and businessman. He co-founded id Software. Carmack was the lead programmer of the id video games Commander Keen, Wolfenstein 3D, Doom, Quake, Rage and their sequels. Carmack is best known for his innovations in 3D graphics, such as his Carmack’s Reverse algorithm for shadow volumes. In August 2013, Carmack took the position of CTO at Oculus VR. (Source + full bio: