RD

Rd is an abbreviation for road.

RD or Rd may also refer to:

• 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
• Razor Dolls, an online blogging group based on SpaceHey and Instagram

• 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

• ‹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)

• 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

• Resident director, a common staff position at universities and colleges with on-campus housing
• Rural dean, an ecclesiastical title in Anglicanism
• Reverendo Don, the Italian written form of address for Catholic priests, equivalent to the English “Reverend Father”

• 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

• 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

• R^d, 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

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

• 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

• Remote desktop (disambiguation)