DST is an abbreviation which stands for: · Daylight saving time · Direct Save Telecom, a UK based telephone and broadband service provider. · Delta Sigma Theta, a non-profit Greek letter organization of college educated women · Direction de la Surveillance du Territoire (Directorate of Territorial Surveillance), the French domestic intelligence agency · Discrete sine transform, a variant of the discrete fourier transform for real and odd functions · Directional Symmetry Transform · Dexamethasone suppression test · Drill Stem Test, a temporary completion of an oil or gas well to test fluid content, pore pressure and rock properties. · DST Systems Inc. a software development company. · Digital Signature Transponder, a cryptographically-enabled radio-frequency identification (RFID) device manufactured by Texas Instruments. · Direct Stream Transfer, lossless compres