RDD
RDD may refer to:
- Adygeya Airlines, by ICAO airline designator
 - Radar detector detector
 - Radiological dispersion device, a weapon designed to spread radioactive material
 - Rally for Democracy and Development (Rassemblement pour la Démocratie et le Développement), a political party in the Republic of the Congo
 - Random digit dialing, a method for selecting people for involvement in telephone surveys
 - Redding Municipal Airport (IATA airport code), a public airport near Redding, California
 - Regression discontinuity design, a statistical technique
 - Replaceable Database Driver (or Replicable Database Driver), a component of computer software that performs database operations, supported by languages such as Clipper
 - Renault Driver Development, a program created by Renault F1 to support young racing drivers
 - Resilient Distributed Dataset, the central data structure of Apache Spark
 - Responsibility-driven design, a software development methodology in which the system is modeled as a collection of objects that collaborate to fulfill the responsibilities
 - Riddlesdown railway station (National Rail station code), London, England
 - Rosai–Dorfman disease, a disorder characterized by abundant histiocytes in lymph nodes and elsewhere in the body
 - Rubber duck debugging, an informal term used in software engineering for a method of debugging code