RAD (countable and uncountable, plural RADs)
- (computing, uncountable) Initialism of rapid application development.
- (countable) Initialism of role activity diagram.
- (medicine) Initialism of reactive attachment disorder.
- (NASA, space science) Initialism of Radiation Assessment Detector (a scientific instrument of the Mars Science Laboratory onboard the Curiosity rover at Mars.)
- 'ard, -ard, -dar, ADR, ARD, Ard, DAR, DRA, Dar, Dra, RDA, ard, dar