Da, DA, dA and other variants may refer to:

Arts and entertainment

Degrees and licenses


Political parties

Other organizations


Science and technology

Biology and medicine

Other uses in science and technology

  • Deca- or da-, an SI prefix for a factor of 10
  • Dalton (unit) or Da, the atomic mass unit
  • SJ Da, a Swedish locomotive
  • Distribution amplifier, a device that accepts a single input signal and provides this same signal to multiple isolated outputs
  • Double-action, a firearm operation mechanism in which the trigger both cocks and releases the hammer

Other uses