DNS is the Domain Name System, a network system used to translate names into IP addresses. DNS may also refer to:
Science and technology Deviated nasal septum, a displaced part of the nose 3,5-Dinitrosalicylic acid, an aromatic compound Dinalbuphine sebacate, an analgesic Direct numerical simulation, a simulation method in computational fluid dynamics Dragon NaturallySpeaking, speech recognition software "Do not stuff", the omitting of a component on a printed circuit board
Other uses Doctor of Nursing Science, an academic research degree Det Nødvendige Seminarium, a teacher training college in Denmark (Democratic People's Alliance), a political party in Bosnia and Herzegovina Dinas Powys railway station (station code), Wales Distressed non-swimmer, a swimming victim type Did not start, in the glossary of motorsport terms, also used in other sports DNS (retail company), an electronics retailer in Russia
See also Didcot, Newbury and Southampton Railway (DN&SR), an English railway 1891–1923