| instruments = Keyboards, programming, backing vocals, theremin
| years = 1994–2000
| tours = [[Self Destruct]]–[[Fragility]]
}}'''Charles Alexander Clouser''' (born June 28, 1963 in Hanover, New Hampshire) is a former [[Nine Inch Nails]] band member whose activities include playing drums and keyboard, engineering, mixing and music programming.
Clouser was a member of NIN from 1994-2000 and was part of the live band on the [[Self Destruct]] and [[Fragility]] tours, as well as collaborating with [[Trent Reznor]] in the studio on various projects. One such collaboration being the ''[[Natural Born Killers Soundtrack|Natural Born Killers]]'' soundtrack on which he aided in recording and producing a new version of "[[Something I Can Never Have]]." His work can also be heard on releases such as ''[[Further Down the Spiral]]'' and ''[[Things Falling Apart]].''
Clouser has also done remixes for various bands, including: White Zombie, [[Marilyn Manson (band)|Marilyn Manson]], Rammstein, Prong, Killing Joke, Type O Negative, Zilch, Schwein, Collide, [[12 Rounds]], Foetus, Meat Beat Manifesto and Esthero.