RDA

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Laws

• Rules of Decision Act, 1789, United States
• Racial Discrimination Act 1975, Australia

Organisations

Government bodies

• Rawalpindi Development Authority, Pakistan (founded 1989)
• Redevelopment agency, a type of municipal department in the United States responsible for urban renewal
• Regional development agency, a class of local body in England (1998–2010)
• Road Development Authority, Sri Lanka (founded 1971)

Other organisations

• Rassemblement Démocratique Africain (1946–1958), a political party in French West Africa
• Reader's Digest Association, an American publisher
• Research Data Alliance, a research community organisation started in 2013
• Revolving Doors Agency, a British charity
• Riding for the Disabled Association, a British equestrian charity
• Rural Development Academy, an institution in Bangladesh

People

• Rafael dos Anjos (born 1984), Brazilian mixed martial artist
• Richard Dean Anderson (born 1950), American actor

Science, technology and mathematics

Biology and medicine

• Recommended Dietary Allowance, one of several recommendations referred to as a Dietary Reference Intake
• Representational difference analysis, a technique used to find sequence differences in two genomic or cDNA samples
• Registered dental assistant
• Relative dentin abrasivity, a measure of toothpaste's effects on tooth dentin

Computing

• Remote Database Access, a protocol
• Robotic data automation, the automation of tasks
• Remote diagnostic agent, an Oracle database diagnostic tool

Other uses in science and mathematics

• Rebuildable Dripping Atomizer, where liquid is dripped directly onto a coil
• Redundancy analysis, a method for ordination in statistics
• Retro-Diels–Alder reaction (rDA), a chemical reaction
• Research and Development Array, a cosmic ray detector development project
• Research Data Australia, a web portal for access to national research data, within Australian Research Data Commons

Other uses

• Redland railway station, Bristol, England (CRS code: RDA)
• Resource Description and Access, a library cataloguing standard
• Resources Development Administration (RDA), a fictional megacorporation in the Avatar films
• Roshan Digital Account, a banking service for overseas Pakistanis