Osa or OSA may refer to:

Places

Osa Peninsula The Osa Peninsula ( es, Península de Osa) is a peninsula located in southwestern Costa Rica, in the Puntarenas Province, with the Pacific Ocean to the west and the Golfo Dulce to the east. The peninsula was formed geologically by a faulting sy ...

, a peninsula in Costa Rica *

Osa (canton) Osa is a canton in the Puntarenas province of Costa Rica. The head city is in Puerto Cortés district. History Osa was created on 29 July 1940 by decree 185. In pre-Columbian times was populated by Boruca which left legacies such as fields and ...

, a canton in the province of Puntarenas in Costa Rica *

Osa Conservation Area Osa Conservation Area is an administrative area which is managed by SINAC for the purposes of conservation in Costa Rica, on the southern Pacific coast region. It contains two National Parks, and numerous Wildlife refuges and other types of natu ...

, an administrative area in Costa Rica * Osa, India, a village in Allahabad, India * Osa, Iran, a village in Mazandaran Province, Iran * Osa, Warmian-Masurian Voivodeship, north Poland * Osa, Norway, a village in Ulvik municipality, Vestland county, Norway * Osa, Russia, the name of several inhabited localities in Russia *

Osa, Missouri Osa is an unincorporated community in the northeast corner of Barry County, in the U.S. state of Missouri. The community is on Missouri Route JJ A supplemental route is a state secondary road in the U.S. state of Missouri, designated with letter ...

, a community in the United States *

Old Scona Academic High School Old Scona Academic School, often referred to as Old Scona or OSA, is a high school located in the Old Strathcona district of Edmonton, Alberta. It is a small academic high school with a population of approximately 340 to 360 students. The school' ...

, a school in Edmonton, Canada * Oakland School for the Arts

Military

Osa-class missile boat The Project 205 Moskit (''mosquito'') more commonly known by their NATO reporting name Osa, are a class of missile boats developed for the Soviet Navy in the late 1950s. Until 1962 this was classified as a large torpedo boat. The Osa class is ...

9K33 Osa The 9K33 ''Osa'' (, literally "wasp"; NATO reporting name SA-8 ''Gecko'') is a highly mobile, low-altitude, short-range tactical surface-to-air missile system developed in the Soviet Union in the 1960s and fielded in 1972. Its export version na ...

(SA-8 Gecko), a Soviet surface-to-air missile launcher * M79 Osa, a Serbian/Yugoslav rocket launcher *

Avia B.122 The Avia B.122 was a Czechoslovak single-seat biplane aerobatic aircraft, which was developed in the mid-1930s. It saw some service in the first years of World War II. History In the spring of 1934, the Czechoslovak Army Command decided that s ...

''Osa'', a Czech trainer aircraft *

Osa (handgun) The PB-4 Osa (russian: ПБ-4 «ОСА», "wasp"), is a family of Russian non-lethal pistols that can be also used as a flare gun, a flashbang gun or a starting pistol. The system consists of the pistol (2-4 cartridges, laser target pointer, ele ...

a Russian non-lethal handgun

Science and technology

Optical spectrum analyzer An optical spectrometer (spectrophotometer, spectrograph or spectroscope) is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum, typically used in spectroscopic analysis to identify mate ...

* ''Osa'' (plant), a monotypic genus of plant in the family Rubiaceae

Medicine

* Obstructive sleep apnea, a sleep-related breathing disorder wherein episodes of upper airway obstruction lead to reduced breathing that interrupts normal sleep *

Osteosarcoma An osteosarcoma (OS) or osteogenic sarcoma (OGS) (or simply bone cancer) is a cancerous tumor in a bone. Specifically, it is an aggressive malignant neoplasm that arises from primitive transformed cells of mesenchymal origin (and thus a sarcoma ...

, a malignant neoplasm of bone

Computing

* Open Scripting Architecture, for AppleScript * Open Services Access, a set of standards for mobile telecommunications * Online Sexual Activity * Open Systems Adapter, an IBM card for mainframes *

Open systems architecture Open systems architecture is a system design approach which aims to produce systems that are inherently interoperable and connectable without recourse to retrofit and redesign. Concept Systems design is a process of defining and engineering the ...

, a telecommunication standard *

Oversampling In signal processing, oversampling is the process of sampling a signal at a sampling frequency significantly higher than the Nyquist rate. Theoretically, a bandwidth-limited signal can be perfectly reconstructed if sampled at the Nyquist rate o ...

Organizations

Oceania Swimming Association The Oceania Swimming Association is the continental governing body recognised by FINA, for the national governing bodies of swimming, open water swimming, diving, water polo, synchronised swimming and masters swimming in Oceania. The body was esta ...

* Ontario Soccer Association *

Ontario Society of Artists The Ontario Society of Artists (OSA) was founded in 1872. It is Canada's oldest continuously operating professional art society. When it was founded at the home of John Arthur Fraser, seven artists were present. Besides Fraser himself, Marmaduke M ...

* Open Solutions Alliance *

Optical Society Optica (formerly known as The Optical Society (OSA) and before that as the Optical Society of America) is a professional society of individuals and companies with an interest in optics and photonics. It publishes journals and organizes conference ...

Order of Saint Anne The Imperial Order of Saint Anna (russian: Орден Святой Анны; also "Order of Saint Anne" or "Order of Saint Ann") was a Holstein ducal and then Russian imperial order of chivalry. It was established by Karl Friedrich, Duke of Holst ...

Order of Saint Augustine The Order of Saint Augustine, ( la, Ordo Fratrum Sancti Augustini) abbreviated OSA, is a religious mendicant order of the Catholic Church. It was founded in 1244 by bringing together several eremitical groups in the Tuscany region who were fo ...

(''Ordo Sancti Augustini''), the Roman Catholic Augustinian order * Oregon Student Association *

Organization of the Secret Army An organization or organisation (English in the Commonwealth of Nations, Commonwealth English; American and British English spelling differences#-ise, -ize (-isation, -ization), see spelling differences), is an legal entity, entity—such as ...

, French far-right nationalist group in Algeria * OSA, a Czech Republic

performance rights organisation A performance rights organisation (PRO), also known as a performing rights society, provides intermediary functions, particularly collection of royalties, between copyright holders and parties who wish to use copyrighted works ''publicly'' in loca ...

* Oriental Society of Australia now the Australian Society for Asian Humanities *

OSA Group The OSA Group (Organization of Contemporary Architects) was an architectural association in the Soviet Union, which was active from 1925 to 1930 and considered the first group of constructivist architects. It published the journal ''SA'' (''Sovre ...

, a Constructivist architectural association of the 1920s based in the USSR * Orissa Society of the Americas, a non-profit organization that promotes understanding of Oriya culture and history * Intelligence-Security Agency of Bosnia and Herzegovina (''Obavještajno sigurnosna / bezbjednosna agencija'', or OSA-OBA), an intelligence and security agency of Bosnia and Herzegovina * Office of the Science Advisor, of the

United States Environmental Protection Agency The Environmental Protection Agency (EPA) is an independent executive agency of the United States federal government tasked with environmental protection matters. President Richard Nixon proposed the establishment of EPA on July 9, 1970; it ...

Office of Special Affairs The Office of Special Affairs (OSA), formerly the Guardian's Office, is a department of the Church of Scientology International. According to the Church, the OSA is responsible for directing legal affairs, public relations, pursuing investigation ...

, a controversial department of the Church of Scientology *

Operation Save America Operation Save America (formerly Operation Rescue National) is a fundamentalist Christian conservative organization based in Concord, North Carolina, a suburb of Charlotte, that opposes human induced abortion and its legality, Islam, and ho ...

* Oscilloquartz SA

People

* Sumire Haruno, Japanese actress, nicknamed Osa *

Lars Osa Lars Osa (13 August 1860 – 9 February 1958) was a Norwegian artist. He also worked with church decoration and restoration and was a noted fiddle player. Biography Lars Andersen was born in the village of Ulvik in Ulvik municipality in Hordalan ...

(1860–1958), Norwegian artist *

Osa Odighizuwa Osawaru Odighizuwa ( ; born August 13, 1998) is an American football defensive tackle for the Dallas Cowboys of the National Football League (NFL). He was drafted by the Cowboys in the third round of the 2021 NFL Draft. He played college footb ...

(born 1998), American football player * Osa Maliki (1907–1969), Indonesian politician

Other uses

Old Stone Age The Paleolithic or Palaeolithic (), also called the Old Stone Age (from Greek: παλαιός '' palaios'', "old" and λίθος ''lithos'', "stone"), is a period in human prehistory that is distinguished by the original development of stone too ...

or Paleolithic * Office of Secret Actions, a fictional government department in the video game ''

Return to Castle Wolfenstein ''Return to Castle Wolfenstein'' is a first-person shooter video game published by Activision, released on November 19, 2001, for Microsoft Windows and subsequently for PlayStation 2, Xbox, Linux and Macintosh. The game serves as a reboot of the ...

'' * Official Secrets Act *

Online savings account An online savings account (OSA) is a savings account managed and funded primarily on the Internet. Features OSAs are often characterized by a higher interest rate or lower fees, compared with traditional savings accounts. Many of these high-yie ...

Open skies agreement The freedoms of the air are a set of commercial aviation rights granting a country's airlines the privilege to enter and land in another country's airspace. They were formulated as a result of disagreements over the extent of aviation liberali ...

* Osaka International Airport (former IATA code: OSA)