==Versions==
===Happiness In Slavery===
This is the original album version. It is characterised by heavy use of loud, layered percussion loops; in fact, the bridge of the song is completely constructed from percussion patterns and synthesized machinery sounds as well as Reznor's distorted voice. Guitars are featured prominently during the verses and choruses, the latter also including synthesized bass. Each verse is punctured by screamed backing vocals. The repetitive buildup at the end of the song eventually gives way to quiet whispers, which segue into "[[Gave Up]]." The end of "[[Heresy]]" also cuts directly to the beginning of this song when they are played back to back.
===Happiness In Slavery (''Fixed'')===