Language and country

• Root of the name for the Occitan language or for its territory, Occitania
  Occitania
  Occitania , also sometimes lo País d'Òc, "the Oc Country"), is the region in southern Europe where Occitan was historically the main language spoken, and where it is sometimes still used, for the most part as a second language...
  
  .

People

• O.C. (rapper)
  O.C. (rapper)
  Omar Credle , known by his stage name, O.C., is an American rapper who has been involved with several renowned underground hip-hop groups and also released many solo albums.-Recording career:...
  
  , an American rapper
• the Officer Commanding
  Officer Commanding
  The Officer Commanding is the commander of a sub-unit or minor unit , principally used in the United Kingdom and Commonwealth. In other countries, the term Commanding Officer is applied to commanders of minor as well as major units.Normally an Officer Commanding is a company, squadron or battery...
  
   a military unit
• Officer Candidate in the United States Navy's STA-21
  STA-21
  STA-21 or Seaman to Admiral - 21 is the U.S. Navy's commissioning program for the 21st century and is designed to enable active-duty Sailors to get a college degree and become commissioned officers.-History:...
  
   program
• Old Carthusian, one who attended Charterhouse School
• Old Colchestrian, one who attended Colchester Royal Grammar School
  Colchester Royal Grammar School
  Colchester Royal Grammar School is a grammar school in Colchester, Essex, founded in AD 1206 and granted two Royal Charters by Henry VIII and by Elizabeth I .-Admissions:...
  
  
• Old Chigwellian, one who attended Chigwell School
  Chigwell School
  Chigwell School is an English co-educational independent school/public school in Chigwell, in the Epping Forest district of Essex. It was founded in 1629 by Samuel Harsnett, a former Archbishop of York . There are around 730 pupils aged between 7 and 18 years...
  
  
• Old Cakeian, one who attended Private Eye
  Private Eye
  Private Eye is a fortnightly British satirical and current affairs magazine, edited by Ian Hislop.Since its first publication in 1961, Private Eye has been a prominent critic and lampooner of public figures and entities that it deemed guilty of any of the sins of incompetence, inefficiency,...
  
  s fictional St Cake's School
• Offensive coordinator
  Offensive coordinator
  An offensive coordinator is a member of the coaching staff of a gridiron football team who is in charge of the offense. Generally, along with his defensive counterpart, he represents the second level of command structure after the head coach...
  
  , one who coaches the offense on a football team
• Owl City
  Owl City
  Owl City is an American electronica musical project by singer-songwriter and multi-instrumentalist Adam Young formed in 2007 in Owatonna, Minnesota. Young created the project while experimenting with music in his parents' basement...
  
  , the stage name for Adam Young, an American electronica artist

Places

• Oakland County, Michigan
  Oakland County, Michigan
  -Demographics:As of the 2010 Census, there were 1,202,362 people, 471,115 households, and 315,175 families residing in the county. The population density as of the 2000 census was 1,369 people per square mile . There were 492,006 housing units at an average density of 564 per square mile...
  
  
• Ocean City (disambiguation)
• Ocean County, New Jersey
  Ocean County, New Jersey
  -Demographics:As of the census of 2000, there were 510,916 people, 200,402 households, and 137,876 families residing in the county. The population density was 803 people per square mile . There were 248,711 housing units at an average density of 151/km²...
  
  
• Oceanside, California
  Oceanside, California
  -2010:The 2010 United States Census reported that Oceanside had a population of 167,086. The population density was 3,961.8 people per square mile...
  
  
• Oklahoma City
  Oklahoma city
  Oklahoma City is the capital and largest city of the U.S. state of Oklahoma.Oklahoma City may also refer to:*Oklahoma City metropolitan area*Downtown Oklahoma City*Uptown Oklahoma City*Oklahoma City bombing*Oklahoma City National Memorial...
  
  
• Osceola, Indiana
  Osceola, Indiana
  Osceola is a town in Penn Township, St. Joseph County, Indiana, United States. The population was 2,463 at the 2010 Census. It is part of the South Bend–Mishawaka, IN-MI, Metropolitan Statistical Area.The town is named after Seminole fighter, Osceola...
  
  
• Orange County, California
  Orange County, California
  Orange County is a county in the U.S. state of California. Its county seat is Santa Ana. As of the 2010 census, its population was 3,010,232, up from 2,846,293 at the 2000 census, making it the third most populous county in California, behind Los Angeles County and San Diego County...
  
  
• Orange County, Florida
  Orange County, Florida
  Orange County is a county located in the U.S. state of Florida and is part of the Orlando-Kissimmee-Sanford Metropolitan Statistical Area . As of 2010 U.S. Census, the county had a population of 1,145,956....
  
  
• Orange County, Indiana
  Orange County, Indiana
  As of the census of 2000, there were 19,306 people, 7,621 households, and 5,342 families residing in the county. The population density was 48 people per square mile . There were 8,348 housing units at an average density of 21 per square mile...
  
  
• Orange County, New York
  Orange County, New York
  Orange County is a county located in the U.S. state of New York. It is part of the Poughkeepsie–Newburgh–Middletown, NY Metropolitan Statistical Area and is located at the northern reaches of the New York metropolitan area. The county sits in the state's scenic Mid-Hudson Region of the Hudson Valley...
  
  
• Orange County, North Carolina
  Orange County, North Carolina
  Orange County is a county located in the U.S. state of North Carolina. As of the 2010 census, the population was 133,801. Its county seat is Hillsborough...
  
  
• Orange County, Texas
  Orange County, Texas
  Orange County is one of 254 counties of the State of Texas and its county seat is the city of Orange, Texas. In the year 2000, the population of Orange County was about 85,000. Orange County is the county in the very southeastern corner of Texas, with a boundary with Louisiana and a seacoast on the...
  
  
• Orange County, Vermont
• Orange County, Virginia
  Orange County, Virginia
  As of the census of 2000, there were 25,881 people, 10,150 households, and 7,470 families residing in the county. The population density was 76 people per square mile . There were 11,354 housing units at an average density of 33 per square mile...
  
  
• Oregon City, Oregon
  Oregon City, Oregon
  Oregon City was the first city in the United States west of the Rocky Mountains to be incorporated. It is the county seat of Clackamas County, Oregon...
  
  

Institutions

• Oakwood College
  Oakwood College
  Oakwood University is a private university located in Huntsville, Alabama, United States. It is owned and operated by the Seventh-day Adventist Church...
  
  , a college in northern Alabama, USA, affiliated with the Seventh-day Adventist Church
• Oberlin College
  Oberlin College
  Oberlin College is a private liberal arts college in Oberlin, Ohio, noteworthy for having been the first American institution of higher learning to regularly admit female and black students. Connected to the college is the Oberlin Conservatory of Music, the oldest continuously operating...
  
  , a liberal arts college in Ohio
• Oklahoma Christian University
  Oklahoma Christian University
  Oklahoma Christian University is a private comprehensive coeducational Christian liberal arts university founded in 1950 by members of the churches of Christ. OC is located on a campus in Oklahoma City. Enrollment for the fall 2011 semester numbered 2,194, which included 1,854 undergraduate and...
  
  
• Ornithological Council
  Ornithological Council
  The Ornithological Council is an association of ornithological organisations based in the Americas involved in bird study and conservation. It was incorporated in Washington, D.C. in 1992 as a not-for-profit organization...
  
  

Technology

• Optical Carrier
  Optical Carrier
  Optical Carrier transmission rates are a standardized set of specifications of transmission bandwidth for digital signals that can be carried on Synchronous Optical Networking fiber optic networks...
  
   levels in the SONET fiber-optic network specification
• Open collector
  Open collector
  An open collector is a common type of output found on many integrated circuits . Instead of outputting a signal of a specific voltage or current, the output signal is applied to the base of an internal NPN transistor whose collector is externalized on a pin of the IC. The emitter of the...
  
  , electrical interface. Used in data communication
• Optics Communications
  Optics Communications
  Optics Communications is a peer-reviewed rapid-publication scientific journal published by Elsevier. It reports on all fields of optical science and technology. Articles are available since year 1969. According to the Library of Congress, and CASSI: Vol.1 No...
  
  , a journal published by Elsevier
• Overclocking
  Overclocking
  Overclocking is the process of operating a computer component at a higher clock rate than it was designed for or was specified by the manufacturer, but some manufacturers purposely underclock their components to improve battery life. Many people just overclock or 'rightclock' their hardware to...
  
  , the process of forcing a computer component to run at a higher clock rate than it was designed for
• Overcurrent
  Overcurrent
  In electricity supply, overcurrent or excess current is a situation where a larger than intended electric current exists through a conductor, leading to excessive generation of heat, and the risk of fire or damage to equipment. Possible causes for overcurrent include short circuits, excessive load,...
  
  , an excessive value of electric current

Miscellaneous

• offering circular
  Offering circular
  An offering memorandum or offering circular is a type of prospectus for a bond or other security. The terms "offering memorandum", "OM", or "offering circular", "OC", are used instead of "prospectus" in certain situations, such as when the offering is not required to be registered with the...
  
   in finance, "the OC" for a bond offering
• The O.C.
  The O.C.
  The O.C. is an American teen drama television series that originally aired on the Fox television network in the United States from August 5, 2003, to February 21, 2007, running a total of four seasons...
  
  , an American television show set in Orange County, California
• Obsessive-compulsive disorder
  Obsessive-compulsive disorder
  Obsessive–compulsive disorder is an anxiety disorder characterized by intrusive thoughts that produce uneasiness, apprehension, fear, or worry, by repetitive behaviors aimed at reducing the associated anxiety, or by a combination of such obsessions and compulsions...
  
   (more common written form: OCD)
• Oleoresin Capsaicin
  Capsaicin
  Capsaicin 2CHCH=CH4CONHCH2C6H3-4--3- ) is the active component of chili peppers, which are plants belonging to the genus Capsicum. It is an irritant for mammals, including humans, and produces a sensation of burning in any tissue with which it comes into contact...
  
   or Oleoresin Capsicum, the active ingredient in pepper spray and OC gas
  • OC Spray, also known as Pepper spray
    Pepper spray
    Pepper spray, also known as OC spray , OC gas, and capsicum spray, is a lachrymatory agent that is used in riot control, crowd control and personal self-defense, including defense against dogs and bears...
    
    
• OC Transpo
  OC Transpo
  OC Transpo is the urban transit service of the City of Ottawa, Ontario, Canada. An integrated hub-and-spoke system of services is available consisting of: regular buses travelling on fixed routes in mixed traffic, typical of most urban transit systems; a bus rapid transit system — a high...
  
  , a public transit operator in Ottawa, Ontario, Canada
• Only Connect
  Only Connect
  Only Connect is a quiz show programme first shown on BBC Four on 15 September 2008, presented by Victoria Coren. In the series, teams compete in a tournament of finding connections between seemingly unrelated clues. Radio Timess listings usually describe it as "a game of patience and lateral...
  
  , a British television programme
• Orange County
  Orange County (film)
  Orange County is a 2002 American comedy film starring Colin Hanks and Jack Black. It was released on January 11, 2002. The movie was distributed by Paramount Pictures and produced by MTV Films and Scott Rudin. The movie was directed by Jake Kasdan and written by Mike White.-Plot:Shaun Brumder is a...
  
  , a 2002 comedy film
• Organized crime
  Organized crime
  Organized crime or criminal organizations are transnational, national, or local groupings of highly centralized enterprises run by criminals for the purpose of engaging in illegal activity, most commonly for monetary profit. Some criminal organizations, such as terrorist organizations, are...
  
  
• openCanvas
  OpenCanvas
  openCanvas is a paint/drawing software developed and published by PGN Co. Ltd. It was originally released as freeware in 2000, but moved to a demo/retail model starting with version 2...
  
  , an art program
• Open cluster
  Open cluster
  An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way Galaxy, and many more are thought to exist...
  
   in astronomy
• Operation Completion
  Operation Completion
  Operation Completion is a now defunct organization in the United States that was devoted to supporting the United States military and its operations involved in the development and reconstruction of War on Terrorism combat theaters like Iraq and Afghanistan...
  
  
• Oral contraceptive, usually referring to the combined oral contraceptive pill
• Oregon Crusaders Drum and Bugle Corps
  Oregon Crusaders Drum and Bugle Corps
  The Oregon Crusaders Drum and Bugle Corps is a Drum Corps International Open Class drum corps based in Portland, Oregon. The corps is known for its undefeated championship season in Div. III in 2004...
  
  , a Drum Corps International group commonly abbreviated as "OC"
• Original character, in fan fiction
• Original content, in Internet abbreviation
• Oxi Clean, a cleaning product
• OxyContin
• PGA Express
  PGA Express
  PGA Express is an airline based in Cascais, Portugal. It is a subsidiary of Portugália and operates services to Spain in a franchise agreement with Portugália...
  
   IATA airline designator
• "Opus clavicembalisticum
  Opus Clavicembalisticum
  Opus clavicembalisticum is a solo piano piece composed by Kaikhosru Shapurji Sorabji, completed on June 26, 1930.The piece is notable for its length and difficulty: at the time of its completion it was the longest piano piece in existence. Its duration is around four hours, depending on tempo...
  
  ", a musical piece for piano
• "Oc", an abbreviation for "Ocarina
  Ocarina
  The ocarina is an ancient flute-like wind instrument. Variations do exist, but a typical ocarina is an enclosed space with four to twelve finger holes and a mouthpiece that projects from the body...
  
  "