DN

DN, dN, or dn may refer to:

Computing and telecommunications

 * Digital number, the discrete of an analog value sampled by an analog-to-digital converter
 * Directory number in a phone system
 * Distinguished Name, an identifier type in the LDAP protocol
 * Domain name, an identification string used within the Internet
 * Domain Nameserver
 * DOS Navigator, a DOS file manager

Mathematics

 * dn (elliptic function), one of Jacobi's elliptic functions
 * Dn, a Coxeter–Dynkin diagram
 * Dn, a dihedral group

Other uses in science and technology

 * Decinewton (symbol dN), an SI unit of force
 * Diametre Nominal, the European equivalent of Nominal Pipe Size
 * Diameter of a rolling element bearing in mm multiplied by its speed in rpm
 * Deductive-nomological model, a philosophical model for scientific explanation
 * Double negative T cells, also called CD4&minus;CD8&minus;
 * Diabetic nephropathy
 * Diabetic neuropathy
 * DN Factor, a value used to calculate the correct lubricant for bearings

Entertainment

 * Double nil, a bid in the game of Spades (card game)
 * Descriptive chess notation
 * Duke Nukem, a video game character and a game franchise

Journalism

 * The Ball State Daily News, the student newspaper of Ball State University in Muncie, Indiana
 * Dagens Næringsliv, a Norwegian newspaper
 * Dagens Nyheter, a Swedish newspaper
 * Democracy Now!, the flagship program for the Pacifica Radio network
 * Diário de Notícias, a Portuguese newspaper

Places

 * Denmark (WMO country code DN)
 * DN postcode area for Doncaster and surrounding areas, UK
 * Dunedin, New Zealand (commonly abbreviated DN)
 * Dadra and Nagar Haveli, a former union territory of India

Other uses

 * DN, IATA code of Dan Air
 * Down (disambiguation)
 * Diebold Nixdorf, American financial technology company
 * Digha Nikaya, a part of the Buddhist Tripitaka
 * International DN, a kind of iceboat
 * Dreadnought, a class of warships
 * Debit note, a commercial document
 * DN, then IATA code for Norwegian Air Argentina
 * DN, then IATA code for Senegal Airlines