Dir, dir, or DIR may refer to:
A directed-energy weapon (DEW) emits highly focused energy, transferring that energy to a target to damage it.
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.
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.
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.
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.
Microsoft DirectX is a collection of application programming interfaces (APIs) for handling tasks related to multimedia, especially game programming and video, on Microsoft platforms.