RD

Rd is an abbreviation for road.

RD or Rd may also refer to:

Arts, entertainment, and media

 * Reader's Digest, a United States general-interest magazine
 * Real Drive, an anime by Production I.G
 * RD (group), a British girl group also known as Ruff Diamondz
 * Rilindja Demokratike, an Albanian newspaper

Businesses and organizations

 * Pratt & Whitney Rocketdyne, a United States rocket engine company
 * Ryan International Airlines (IATA airline designator RD)
 * USDA Rural Development, an agency of the United States Department of Agriculture

Language

 * ‹rd›, a Latin alphabet digraph of a retroflex stop in Aboriginal Australian languages
 * rd, an English-language ordinal indicator, for ordinal numbers ending in "third" (e.g. 3rd, 23rd, 33rd)

Military

 * Emblem for Reserve Force Service or Reserve Decoration, an award of the South African National Defense Force Military Reserve
 * Repair Depot (e.g., 6 Repair Depot), in military use
 * Reserve Decoration, an award for service in the Royal Navy Reserve of the United Kingdom

Positions and titles

 * Resident director, a common staff position at universities and colleges with on-campus housing
 * Rural dean, an ecclesiastical title in Anglicanism

Computing

 * Rata Die, a calendar-independent system to assign numbers to calendar dates
 * Rate–distortion optimization, a decision algorithm used in video compression
 * Rider (software), a cross-platform IDE intended for C# and .NET development
 * rmdir, a shell command meaning "remove directory"
 * Route distinguisher, in data networking, a concept in Multiprotocol Label Switching
 * Ruby Document format, a markup language used for documentation of Ruby programs

Health and medicine

 * Restrictive dermopathy
 * Reading disability, a condition resulting primarily from neurological factors
 * Registered Dietitian, an expert in dietetics
 * Retinal detachment, a disorder of the eye
 * Risk difference, a term in epidemiology related to absolute risk reduction

Other uses in science, technology, and mathematics

 * Rd, the mathematical domain of real numbers
 * Reaktivniy Dvigatel, a Soviet Russian prefix for an engine design series (literally, "reactive engine"; see RD-8 for example)
 * Research and development
 * Rutherford (unit), a unit of radioactivity

Transportation

 * Red Line (Washington Metro)
 * Richmond and Danville Railroad

Other uses

 * Dominican peso (currency symbol: RD$)
 * rd, a round or cartridge of ammunition
 * Recurring deposit
 * Regional district
 * Rural delivery service, mail delivery in what are traditionally considered rural areas in the United States