RA

RA is an abbreviation or code which may refer to (for the word, see Ra):

Science
Right ascension, an astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system
Relation algebra, a type of mathematical structure
Right atrium, one of the four chambers of the heart
Rheumatoid arthritis, a chronic, inflammatory autoimmune disorder that causes the immune system to attack the joints
Retinol also known as retinoic acid (RA)

Ranks
Registered Architect, a designer who is licensed by a government to practice architecture
Research assistant, a graduate student employed by a college or university for the purpose of academic research
Research associate, a post doctoral academic researcher
Resident assistant or advisor, a college student charged with supervising students living in a residence hall
Royal Academician, a member of the Royal Academy, also known as the Royal Academy of Arts

Authorities and armys
Registration authority, maintenance agency is a body given the responsibility of maintaining lists of codes
Regulatory Affairs, a department in charge of government relations within regulated industries
Rowing Australia, the governing body for the sport of rowing in Australia.
Resettlement Administration, a New Deal program under Franklin D. Roosevelt
Regular Army, the permanent force of the United States Army that is maintained during peacetime
Provisional Irish Republican Army (PIRA), as used by its sympathizers ("The 'RA")
Royal Artillery, a Corps of the British Army
Russian Army

Designations
RA color rendering index is measured on a scale of 1 to 100. Light with just a single colour has a RA of 1 while natural sunlight has a RA of 100
RA is the IATA code for Nepal Airlines
RA0 to RA4 are ISO 217 standard paper sizes

Places
Rawlins County, Kansas, whose two-letter code on Kansas license plates is RA
Roosna-Alliku, Estonia
Réseau Albert - a group of metre gauge railways centred on Albert, Somme in France
Robert Academy, the name for the former college section of Robert College of Istanbul
Roosevelt Academy, a small liberal arts college located in Middelburg in the Netherlands
Rolling Acres, a dead mall in Akron, OH
RA Nightclub at the Luxor Hotel in Las Vegas

Computers
The file extension of a RealAudio file
RemoteAccess BBS software
Rocket Arena, a free mod for the multiplayer first-person shooter Quake series
The abbreviation for Command & Conquer: Red Alert or its sequel Command & Conquer: Red Alert 2

Business
Return Authorization or Return merchandise authorization, when a customer is not satisfied with a product and asks to return it to the supplier

Entertainment
Rage Against the Machine, rock band from L.A.
Resident Advisor, an online electronic music magazine dedicated to the global dance music scene
Rise Against, melodic hardcore band from Chicago, Illinois, USA
RA The Rugged Man

Other
Rehmat-ullah-Allai (God's blessing be upon him) — RA in this form is usually added as a suffix after great peoples' names, as in "The Quaid-I-Azam (RA)", referring to Muhammad Ali Jinnah
Radhiallahu 'anhu
The irreverent "Religious Advisor" of a Hash House Harriers club

For the word or abridgement Ra, see Ra (disambiguation)

See also

RAH (disambiguation)
Rha
RAS
Ras (disambiguation)

Translation

The word "RA" occurs as such in the following languages: English, Czech, German, French, Korean, Indonesian, Italian, Japanese, Slovenian, Tagalog, Chinese.

Translation(s) in other languages: Latvian: RA (nozīmju atdalīšana), Ripuarian: RA (Watt ėßß datt?), Russian: РА.