RTD may refer to:
Science and technology Real-time data Residence time distribution Resonant-tunneling diode Round-trip delay time, in telecommunications Research and development, Research and Technical (or Technological) Development Resistance Temperature Detector, a resistance thermometer; RTD is also used to rate or describe plywood manufacturing processes where RTD sensors significantly reduce the delamination caused by insufficient heating of the plywood during the press cycle.
Broadcasting Radio Tanzania Dar es Salaam Radio Television of Djibouti (Radiodiffusion Télévision de Djibouti) RT Documentary, an English- and Russian-language TV channel Russell T Davies, Welsh screenwriter and television producer
Publications RTD info, a European science magazine Richmond Times-Dispatch newspaper, Virginia, US
Transportation Regional Transportation District, Denver, Colorado, US San Joaquin Regional Transit District, Stockton, California, US Southern California Rapid Transit District, merged into Los Angeles Metro
Other uses Ready to drink beverage Corner retirement (referee technical decision), in boxing Retired (abbreviation) Right to Die Russell's theory of descriptions