Rd is an abbreviation for road. RD or Rd may also refer to:

Arts and entertainment

* '' Real Drive'', an anime by Production I.G *

RD (group) RD, also known as Ruff Diamondz, were a British girl group from London comprising Julie "Chronz" Norton, Martika Lecointe-Akore, and Troy Hudson. The group were formed in 2009 when a manager introduced the members to each other via Myspace. The ...

, a British girl group also known as Ruff Diamondz * ''

Rilindja Demokratike ''Rilindja Demokratike'' ( en, Democratic Rebirth and short RD) is an Albanian newspaper founded and continuously published in Tirana. Rilindja Demokratike is the official newspaper of the Democratic Party of Albania. Its chief editor is Bledi Ka ...

'', an Albanian newspaper

Businesses and organizations

* USDA Rural Development, an agency of the United States Department of Agriculture *

Ryan International Airlines Ryan International Airlines, Inc. was an American FAR 121 airline with domestic, flag, and supplemental authority. Synopsis and history Based at Chicago Rockford International Airport in Rockford, Illinois, the US Postal Service was once the a ...

(IATA airline designator RD)

Military decorations

Reserve Decoration The Decoration for Officers of the Royal Naval Reserve, commonly known as the Reserve Decoration (RD) was a medal awarded to officers with at least fifteen years service in the Royal Naval Reserve (RNR) of the United Kingdom. The medal was instit ...

, an award for service in the Royal Navy Reserve of the United Kingdom * Emblem for Reserve Force Service or Reserve Decoration, an award of the South African National Defense Force Military Reserve

Science, technology, and mathematics

Computing and mathematics

* Rata Die, a calendar-independent system to assign numbers to calendar dates * Remote Desktop, a graphical interface to connect one computer to another over a network * Rider (software), a cross-platform IDE intended for C# and .NET development *

Route distinguisher A route distinguisher is an address qualifier used only within a single internet service provider's Multiprotocol Label Switching (MPLS) network. It is used to distinguish the distinct virtual private network (VPN) routes of separate customers who ...

, 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 Retinal detachment is a disorder of the eye in which the retina peels away from its underlying layer of support tissue. Initial detachment may be localized, but without rapid treatment the entire retina may detach, leading to vision loss and blin ...

, a disorder of the eye * Risk difference, a term in epidemiology related to

absolute risk reduction The risk difference (RD), excess risk, or attributable risk is the difference between the risk of an outcome in the exposed group and the unexposed group. It is computed as I_e - I_u, where I_eis the incidence in the exposed group, and I_u is the ...

Other uses in science and technology

Rate–distortion optimization Rate-distortion optimization (RDO) is a method of improving video quality in video compression. The name refers to the optimization of the amount of ''distortion'' (loss of video quality) against the amount of data required to encode the video, th ...

, a decision algorithm used in video compression * ''Reaktivniy Dvigatel'', a Soviet Russian prefix for an engine design series (literally, "reactive engine"; see RD-8 for example) *

Research and development Research and development (R&D or R+D), known in Europe as research and technological development (RTD), is the set of innovative activities undertaken by corporations or governments in developing new services or products, and improving existi ...

* Pratt & Whitney Rocketdyne, a United States rocket engine company * Rutherford (unit), a unit of radioactivity

Other uses

* R^d, the mathematical

domain Domain may refer to: Mathematics *Domain of a function, the set of input values for which the (total) function is defined **Domain of definition of a partial function **Natural domain of a partial function **Domain of holomorphy of a function * Do ...

of real numbers * ‹rd›, a Latin alphabet digraph of a retroflex stop in Aboriginal Australian languages * Repair Depot (e.g.,

6 Repair Depot No. 6 Repair Depot (6 RD) was an aircraft modification and repair unit of the Royal Canadian Air Force's Air Materiel Command located at CFB Trenton, Trenton, Ontario. Duties of No. 6 RD included handling aircraft at other stations around southern ...

), in military use * Resident director, a common staff position at universities and colleges with on-campus housing * Richmond and Danville Railroad * rmdir, a shell command meaning "remove directory" * Rural Dean, an ecclesiastical title in

Anglicanism Anglicanism is a Western Christian tradition that has developed from the practices, liturgy, and identity of the Church of England following the English Reformation, in the context of the Protestant Reformation in Europe. It is one of the ...

* Rural delivery service, mail delivery in what are traditionally considered rural areas in the United States *

Dominican peso ' ( en, Dominican peso) has been the name of the currency of the Dominican Republic ( es, República Dominicana) since 2011. Its Currency symbol, symbol is "Dollar sign, $", with "RD$" used when distinction from other pesos (or dollars) is requi ...

(currency symbol: RD$) * An English-language ordinal indicator, for ordinal numbers ending in "third" (e.g. 3rd, 23rd, 33rd) * A round or cartridge of ammunition *An abbreviation of Regional district {{disambiguation