OPA
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(Redirected from Opa)
OPA may refer to:
- Obscene Publications Act 1959, an Act of Parliament in the United Kingdom
- Office of Price Administration, a United States government office set up by President Roosevelt to stabilize prices and rents after the outbreak of World War II
- Oil Pollution Act of 1990, a United States law
- Ontario Power Authority, a government agency in Canada
- Online Privacy Alliance, a coalition of Internet companies
- Open Platform Architecture, a software interface from Ericsson Mobile Platforms for use internally in cellular phones;
- Optical parametric amplifier, a method to amplify laser light
- Oropharyngeal airway, a device used to keep the upper respiratory airway open
- Outward Processing Arrangement, a trade agreement between Hong Kong and mainland China
- Opa, the nickname of Dorus Rijkers, Dutch lifeboat-captain who rescued over 500 people in the course of his career
- OPA, a mixture used in chemical weapons such as M687
- ortho-phthalaldehyde, a chemical compound
- opa, Dutch informal word for grandfather
- Opa, German informal word for grandfather
- Opa, Greek word of cheer
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