ND

ND may refer to:

Arts and entertainment

• Nancy Drew, a character in the series of books and video games with the same name
• Naughty Dog, an American video game developer
• Nuclear Dawn, a mod for the game Half-Life 2
• nD, a type of alien in the United Kingdom TV series Invasion Earth

Businesses

• Norsk Data, a defunct Norwegian computer manufacturer
• NetDocuments, a document management company

Language

• Nd (digraph), a digraph present in many African languages

• Notre Dame (disambiguation), the name of a number of churches and colleges

Politics

• New Democracy (Canada), a former political party in Canada
• New Democracy (Greece), one of the main center-right liberal political parties in Greece
• National Democrats (Sweden), a far-right political party in Sweden
• Nuclear disarmament, the dismantlement and proposed dismantling of nuclear weapons

Science and technology

Mathematics

• nd (elliptic function), one of Jacobi's elliptic functions

Medicine

• NADH dehydrogenase, an enzyme
• Non-distended, an abdominal distension clinical examination value
• Doctor of Naturopathic Medicine, a degree in naturopathic medicine
• Notifiable disease, any disease that is required by law to be reported to government authorities

Physics

• ND Experiment, a particle physics experiment in Novosibirsk, Russia
• n_D, the refractive index of a medium at a wavelength of 589.8 nm

Other uses in science and technology

• Neighbor Discovery Protocol, an Internet protocol
• Neodymium, an element with the symbol "Nd"
• Neutral density filter, a type of filter used in photography
• Contax N Digital, a digital camera
• ND for Nominal Diameter in piping
• ND MX-5 Miata, the fourth generation of the Mazda MX-5

Other uses

• National Diploma (Ireland), an academic qualification in the Republic of Ireland
• Navy Diver, an occupational rating in the U.S. Navy
• Negligent discharge, a careless discharge of a firearm
• New Dawn (disambiguation), with various meanings
• Norrlands dragonregemente, a cavalry regiment of the Swedish Army
• Notitia Dignitatum, a historical document of the late Roman empire
• Nuclear disarmament, the dismantlement and proposed dismantling of nuclear weapons
• Neurodiversity