Theory in Practice is a Swedish technical death metal band incorporating many influences from progressive metal. The band writes very technical and complex songs consisting of a lot of time and tempo changes. The band was founded in July 1995. After a year of rehearsals and gigs, they recorded a demo called Submissive in the Abyss Studio. They recorded three full-length albums after that. In December 2002, the band went on an extended hiatus and began recording again in February 2003.