Science

• Right ascension
  Right ascension
  Right ascension is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. The other coordinate is the declination.-Explanation:...
  
  , an astronomical term
• Relation algebra
  Relation algebra
  In mathematics and abstract algebra, a relation algebra is a residuated Boolean algebra expanded with an involution called converse, a unary operation...
  
  , a type of mathematical structure

Medicine

• Relative analgesia machine
  Relative analgesia machine
  A relative analgesia machine is used by dentists to induce inhalation sedation in their patients. It delivers a mixture of nitrous oxide and oxygen. A relative analgesia machine is simpler than an anaesthetic machine, as it does not feature the additional medical ventilator and anaesthetic...
  
  , a type of sedative
• Right atrium
  Right atrium
  The right atrium is one of four chambers in the hearts of mammals and archosaurs...
  
  , one of the four chambers of the heart
• Rheumatoid arthritis
  Rheumatoid arthritis
  Rheumatoid arthritis is a chronic, systemic inflammatory disorder that may affect many tissues and organs, but principally attacks synovial joints. The process produces an inflammatory response of the synovium secondary to hyperplasia of synovial cells, excess synovial fluid, and the development...
  
  , an autoimmune disorder
• Retinoic acid
  Retinoic acid
  Retinoic acid is a metabolite of vitamin A that mediates the functions of vitamin A required for growth and development. Retinoic acid is required in chordate animals which includes all higher animals from fishes to humans...
  
  , a metabolite of vitamin A

Jobs and titles

• Registered Architect
  Architect
  An architect is a person trained in the planning, design and oversight of the construction of buildings. To practice architecture means to offer or render services in connection with the design and construction of a building, or group of buildings and the space within the site surrounding the...
  
  , a professional suffix typically used if not also a member of an architecture professional association
• Research assistant
  Research assistant
  A research assistant is a researcher employed, often on a temporary contract, by a university or a research institute, for the purpose of assisting in academic research...
  
  , a graduate student employed by a college or university for the purpose of academic research
• Research associate
  Research associate
  The title of research associate is used to denote an academic research position at a university or similar institution. A research associate usually conducts research under the supervision of a principal investigator. In contrast to a research assistant or research officer, a research associate...
  
  , a post-doctoral academic researcher
• Resident assistant
  Resident assistant
  A resident assistant , commonly shortened to RA is a trained peer leader who supervises those living in a residence hall or group housing facility...
  
   or advisor, a student who supervises tenants of a residence hall
• Royal Academician, one of the 80 practicing artists elected as a member of the Royal Academy

Official organizations

• Registration authority
  Registration authority
  A registration authority or maintenance agency is a body given the responsibility of maintaining lists of codes under international standards and issuing new codes to those wishing to register them...
  
  , a body which maintains lists of international standards codes
• Regulatory Affairs
  Regulatory Affairs
  Regulatory affairs , also called government affairs, is a profession within regulated industries, such as pharmaceuticals, medical devices, energy, and banking...
  
  , a department in charge of industry-government relations
• Rowing Australia
  Rowing Australia
  Rowing Australia is the governing body for the sport of rowing in Australia.Established in 1925, it is the only organisation recognised by the Federation Internationale des Societies d’Aviron , the Australian Sports Commission , and the Australian Olympic Committee , to conduct rowing activities...
  
  , governing body for the sport of rowing in Australia
• Resettlement Administration
  Resettlement Administration
  The Resettlement Administration was a U.S. federal agency that, between April 1935 and December 1936, relocated struggling urban and rural families to communities planned by the federal government....
  
  , a New Deal government program in the United States

Military

• Regular Army
  Regular Army
  The Regular Army of the United States was and is the successor to the Continental Army as the country's permanent, professional military establishment. Even in modern times the professional core of the United States Army continues to be called the Regular Army...
  
  , the permanent force of the US Army that is maintained during peacetime
• Provisional Irish Republican Army
  Provisional Irish Republican Army
  The Provisional Irish Republican Army is an Irish republican paramilitary organisation whose aim was to remove Northern Ireland from the United Kingdom and bring about a socialist republic within a united Ireland by force of arms and political persuasion...
  
  
• Royal Artillery
  Royal Artillery
  The Royal Regiment of Artillery, commonly referred to as the Royal Artillery , is the artillery arm of the British Army. Despite its name, it comprises a number of regiments.-History:...
  
  , a Regiment of the British Army
• Russian Army
  Russian Ground Forces
  The Russian Ground Forces are the land forces of the Armed Forces of the Russian Federation, formed from parts of the collapsing Soviet Army in 1992. The formation of these forces posed economic challenges after the collapse of the Soviet Union, and required reforms to professionalize the force...
  
  , also known as the Russian Ground Forces, formed in 1992

Designations

• A color rendering index used to measure colors in light
• Nepal Airlines, IATA code RA
• Several ISO 217
  ISO 217
  The ISO 217:1995 standard defines the RA and SRA paper formats.These paper series are untrimmed raw paper. RA stands for “raw format A” and SRA stands for “supplementary raw format A”. The RA and SRA formats are slightly larger than the corresponding A series formats. This allows bleed on printed...
  
   standard paper sizes

Places

• Rawlins County
  Rawlins County, Kansas
  Rawlins County is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 2,519. The largest city and county seat is Atwood...
  
  , Kansas, county, of which the largest city is Atwood
• Roosna-Alliku
  Roosna-Alliku
  Roosna-Alliku is a small borough in Roosna-Alliku Parish, Järva County in northern-central Estonia....
  
  , village in Estonia
• Réseau Albert, a group of railways in France from 1889–1955
• Robert Academy, a former section of Robert College in Istanbul
• Roosevelt Academy
  Roosevelt Academy
  Roosevelt Academy is a small liberal arts college located in Middelburg in the Netherlands. It offers a residential setting and is an international honors college of Utrecht University.-History:...
  
  , a college in the Netherlands
• Rolling Acres
  Rolling Acres
  Rolling Acres is a shopping district in Akron, Ohio. Planning for the area began in 1960s with Forest City Enterprises, a Cleveland real estate company and the powerful Buchholzer family, whose previous endeavors involved financing much of the Chapel Hill Mall area. Despite warnings by civic...
  
  , a mall in Ohio
• Royal Academy
  Royal Academy
  The Royal Academy of Arts is an art institution based in Burlington House on Piccadilly, London. The Royal Academy of Arts has a unique position in being an independent, privately funded institution led by eminent artists and architects whose purpose is to promote the creation, enjoyment and...
  
  , the Royal Academy of Arts in London
• RA Nightclub, a club located at the Luxor Hotel
  Luxor Hotel
  Luxor Las Vegas is a hotel and casino located on the Las Vegas Strip in Paradise, Nevada. The 30-story hotel, which is operated by MGM Resorts International, features a casino floor that includes over 2,000 slot machines and 87 table games....
  
   in Las Vegas

Computing

• RemoteAccess
  RemoteAccess
  RemoteAccess is a DOS Bulletin Board System software package written by Andrew Milner and was published by his company Wantree Development in Australia. RemoteAccess was written in Turbo Pascal with some Assembly Language routines. RemoteAccess began in 1989 as a clone of QuickBBS by Adam Hudson...
  
  , a BBS software program
• Rocket Arena
  Rocket Arena
  Rocket Arena is a free modification for the multiplayer first-person shooter games Quake, Quake II, Quake III Arena and Quake 4. There are also ports for Half-Life and Unreal Tournament...
  
  , a Quake mod
• Command & Conquer: Red Alert
  Command & Conquer: Red Alert
  Command & Conquer: Red Alert is a real-time strategy computer game of the Command & Conquer franchise, produced by Westwood Studios and released by Virgin Interactive in...
  
  , a game
• .ra, the file extension of a RealAudio
  RealAudio
  RealAudio is a proprietary audio format developed by RealNetworks and first released in April 1995. It uses a variety of audio codecs, ranging from low-bitrate formats that can be used over dialup modems, to high-fidelity formats for music. It can also be used as a streaming audio format, that is...
  
   file
• Router Advertisement messages, in the context of IPv6 autoconfiguration http://www.cisco.com/web/about/ac123/ac147/archived_issues/ipj_7-2/ipv6_autoconfig.html

Technology

• Resolution Advisory, an aircraft instruction from a Traffic Collision Avoidance System
  Traffic Collision Avoidance System
  A traffic collision avoidance system or traffic alert and collision avoidance system is an aircraft collision avoidance system designed to reduce the incidence of mid-air collisions between aircraft...
  
  

Entertainment

• Resident Advisor
  Resident Advisor
  Resident Advisor is an online electronic music magazine dedicated to the global dance music scene. The website won a People's Voice award in the 12th Annual Webby Awards in 2008.-Site History:...
  
  , an online magazine
• Rise Against
  Rise Against
  Rise Against is an American punk rock band from Chicago, Illinois, formed in 1999. The band currently consists of Tim McIlrath , Zach Blair , Joe Principe and Brandon Barnes .Rise Against spent its first five years signed to the independent record label Fat Wreck Chords, on which it...
  
  , an American hardcore band
• Rusted Angel
  Rusted Angel
  -Darkane:*Christofer Malmström – lead guitar*Peter Wildoer – drum kit*Jörgen Löfberg – bass guitar*Klas Ideberg – rhythm guitar*Lawrence Mackrory – vocals-Production:*Wez Wenedikter – executive producer*Daniel Bergstrand – production, engineering, mixing...
  
  
• R.A. the Rugged Man
  R.A. The Rugged Man
  R. A. Thorburn, better known as R.A. the Rugged Man, is an emcee from Suffolk County, Long Island, New York.-Career:At 18, R.A. signed with Jive Records and then in the mid-1990s signed with Priority Records/EMI. His contract was later absorbed by Capitol Records but he began recording...
  
  , an emcee

Other

• Rescue ambulance
  Ambulance
  An ambulance is a vehicle for transportation of sick or injured people to, from or between places of treatment for an illness or injury, and in some instances will also provide out of hospital medical care to the patient...
  
  
• Radhiallahu 'anhu
  Radhiallahu 'anhu
  Radhiallahu 'anhu is an Arabic phrase meaning, "May God Be Pleased With Him." This phrase is usually uttered after a Companion's name. There are grammatical variations used after the names of female companions or when more than one person is mentioned at the same time...
  
  , an Arabic phrase uttered after a righteous person's name
• Risk Assessment
  Risk assessment
  Risk assessment is a step in a risk management procedure. Risk assessment is the determination of quantitative or qualitative value of risk related to a concrete situation and a recognized threat...
  
  , a step in a risk management procedure
• Risk Analysis
• The "Religious Advisor" of a Hash House Harriers
  Hash House Harriers
  The Hash House Harriers is an international group of non-competitive running, social and drinking clubs...
  
   club
• Remittance advice
  Remittance advice
  A remittance advice is a letter sent by a customer to a supplier, to inform the supplier that their invoice has been paid. If the customer is paying by cheque, the remittance advice often accompanies the cheque...
  
  , a letter sent by a customer to a supplier, to inform the supplier that their invoice has been paid
• Republic Act, nomenclature used for Philippine laws from 1946 to 1972 and after 1987

See also

• Ra (disambiguation)
  Ra (disambiguation)
  Ra is the Sun-god of Ancient Egypt.Ra may also refer to:- Names and titles :* Rā, a Māori word for the Sun* Ra I and Ra II, reed boats used by Thor Heyerdahl’s transatlantic expeditions named after Ra...
  
  
• RAH (disambiguation)
• RHA (disambiguation)
• RAS (disambiguation)
• Ras (disambiguation)