Dir, dir, or DIR may refer to:
In science and mathematics, the Dirac delta function, or δ function, is a generalized function, or distribution, on the real number line that is zero everywhere except at zero, with an integral of one over the entire real line.
DirecTV (stylized as DIRECTV) is an American direct broadcast satellite service provider based in El Segundo, California and is a subsidiary of AT&T.
A directed-energy weapon (DEW) emits highly focused energy, transferring that energy to a target to damage it.
Dirk Werner Nowitzki (German pronunciation: [ˈdɪʁk ˈvɛʁnɐ noˈvɪtski]) (born June 19, 1978) is a German professional basketball player for the Dallas Mavericks of the National Basketball Association (NBA).
Direct democracy (also known as pure democracy) is a form of democracy in which people decide (e.g. vote on, form consensus on) policy initiatives directly.
Dirty Dancing is a 1987 American romantic dance drama film written by Eleanor Bergstein, directed by Emile Ardolino and starring Patrick Swayze and Jennifer Grey in the lead roles, as well as Cynthia Rhodes and Jerry Orbach.
Direct3D is a graphics application programming interface (API) for Microsoft Windows. Part of DirectX, Direct3D is used to render three-dimensional graphics in applications where performance is important, such as games.
The "Dirty War" (Spanish: Guerra Sucia), was the name used by the Argentine Military Government for a period of state terrorism in Argentina from roughly 1974 to 1983 (some sources date the beginning to 1969), during which military and security forces and right-wing death squads in the form of the Argentine Anticommunist Alliance (Triple A) hunted down and killed left-wing guerrillas, political dissidents, and anyone believed to be associated with socialism.
Direct marketing is a form of advertising which allows businesses and nonprofit organizations to communicate directly to customers through a variety of media including cell phone text messaging, email, websites, online adverts, database marketing, fliers, catalog distribution, promotional letters and targeted television, newspaper and magazine advertisements as well as outdoor advertising.