"Seven" is a song written by David Bowie and Reeves Gabrels for the album Hours in 1999. As with some of the other songs from Hours it was originally written for the computer game Omikron - The Nomad Soul from 1999.[1] In July 2000, it was released as the fourth single from the album. The version used in the Omikron - The Nomad Soul was called "Demo version" on the single releases.