"'''''Survivalism'''''" (also known as '''''[[Halo numbers|Halo 23]]''''') is the first single by [[Nine Inch Nails]] from their 2007 album ''[[Year Zero|Year Zero]]''.
On February 16March 13, 2007, nin.com confirmed that ''Survivalism'' will be the single was released as a single in Europe digitally on March 5iTunes, however it was later revealed on March 4 that and the Survivalism single has been delayed CD and is due to be vinyl singles were released on April 2, 2007.
==Tracklisting==