}}[[image:discipline.jpg|thumb|''Discipline Track Art'']]'''"Discipline"''' is the latest single from [[Nine Inch Nails]], and is the fourth track on Halo 27, ''[[The Slip]]. '' It contains a beat reminiscent of "[[Only (song)|Only]]" from 2005's ''[[With Teeth (halo)|With Teeth]]'' and the lyrics seem to have a sado-masochistic overtone.
The song was released to radio stations simultaneously around 2:30pm EST on April 22, 2008, being mastered only the day before, and was then made available as a free download via the official Nine Inch Nails website. When downloaded, it comes with track art and a note found in the comments box of the song info saying "Go to [[nin.com|www.nin.com]] on May 5", which was the release date of the then-unannounced album ''[[The Slip]].''. The lyrics are also contained.
"Discipline" is the first radio single from NIN since becoming an independent recording act, following their final release under a major record label, 2007's ''[[Y34RZ3R0R3M1X3D]].'' Due to the advertisement and short notice of the release, the song was posted on YouTube almost immediately after release.