OPA

Opa may refer to:

• Opa! (Greek expression), a Greek expression

People

• Opa Muchinguri, a Zimbabwean politician
• Opa Nguette, a French footballer
• Opa, the nickname of Dorus Rijkers, Dutch lifeboat-captain who rescued over 500 people in the course of his career
• Opa-Opa is a character in the Fantasy Zone video game series
• Opa, Dutch or German informal word for grandfather
• Opa!, a film starring Matthew Modine and Agni Scott

Geography

• Opa Station, a North Korean railway station

Music

• Opa (Uruguayan band), Uruguayan jazz group
• Opa (Swedish band), a Swedish musical band
• "Opa" (Giorgos Alkaios song), a song by Giorgos Alkaios & Friends competing in the Eurovision Song Contest 2010 for Greece
• "Opa Opa", a song by Notis Sfakianakis, later covered by both Antique and Despina Vandi
• Opa Opa (album), an alternative name to the album Mera Me Ti Mera by Antique

Brands

• Toyota Opa, a car
• Opa (roller coaster), a closed roller coaster in Wisconsin
• Opa (programming language), a web development platform

The acronym OPA may refer to:

Chemistry and physics

• Ortho-phthalaldehyde, a dialdehyde used in the synthesis of heterocyclic compounds and a reagent in the analysis of amino acids
• OPA, a mixture used in chemical weapons such as M687
• optical parametric amplifier, laser light source that emits light of variable wavelengths

Government

• Office of Population Affairs, a United States agency providing advice on population issues
• Office of Price Administration, a United States government office set up to stabilize prices and coordinate rationing after the outbreak of World War II
• Office of the Pardon Attorney, an agency of the United States Department of Justice
• Ontario Power Authority, a government agency in Canada
• Oil and Pipelines Agency, a United Kingdom agency

International agreements

• Ouagadougou Peace Agreement, that put an end to the Ivorian Civil War
• Outward Processing Arrangement, a trade agreement between Hong Kong and mainland China

Laws

• Obscene Publications Act 1959, an Act of Parliament in the United Kingdom
• Oil Pollution Act of 1990, a United States law

Medicine

• Oropharyngeal airway, a device used to keep the upper respiratory airway open
• Out-patient appointments
• Ovine Pulmonary Adenocarcinoma, a disease of the lungs in sheep and goats, also known as Jaagsiekte

Sports

• FC OPA, association football club from Oulu, Finland

Associations

• Postnominal letters used by the Anglican Order of Preachers (Ordo Praedicatorum Anglicanus
• Oligo Pool Assay, a SNP genotyping platform from Illumina
• Online Privacy Alliance, a coalition of Internet companies
• OPA co. ltd. (oriental park avenue), a Japanese clothing retail chain and subsidiary of Daiei
• Open Platform Architecture, a software interface from Ericsson Mobile Platforms for use internally in cellular phones
• Oracle Policy Automation, an enterprise applications suite
• Ordre des Palmes Academiques, an Order of Chivalry of France for academics and cultural and educational figures
• Oregon Pioneer Association, a fraternal-lineage society first established as the Oregon Pioneer Society in 1867
• Oregon Potters Association, not-for-profit group of clay artists

Fiction

• Outer Planets Alliance, fictional organization in James S.A. Corey's Leviathan Wakes, following books and The Expanse TV series based upon them