DDX

DDX may refer to:

• $\frac{\mathrm{d}}{\mathrm{d}x}$, a common notation for the differential operator with respect to a variable x
• DD(X), former program name of a class of U.S. Navy destroyers
• Differential diagnosis (DDx or D/Dx), a systematic method used to identify unknowns
• Device Dependent X, graphics device drivers supporting 2D acceleration in the X.Org Server
• DDX (chemistry), a collective name for DDT and its breakdown products DDE and DDD

See also

• 3DDX, a rhythm video game
• DXD (disambiguation)