Terrence Andrew Davis was an American programmer who created and designed the operating system TempleOS.
On the evening of August 11, 2018, while walking alongside railroad tracks in The Dalles, Oregon, Davis was struck and killed by a Union Pacific train. Investigators could not determine whether his death was suicide or accidental, although the train engineer believed his death to be a suicide. The police report stated that Davis was walking with his back toward the train and that he turned around before the moment of impact.