ddd

Initialism of die-deterioration doubling (“a common form of mint-made error on coins that results from degradation of the die used to strike the coin”).

A designation on prerecorded compact discs indicating a "full digital recording" (recorded, mixed and mastered in digital).

Initialism of dichlorodiphenyldichloroethane (“insecticide related to DDT”).

Initialism of domain-driven design (“methodology and set of priorities for object oriented programming”).

Initialism of direct distance dialing (“network-provided service that enables non-local telephone calls to be made without operator assistance”).