OPA

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Opa may refer to:

Arts and media[edit]

Fictional characters and entities[edit]

Film[edit]

Music[edit]

Laws and international agreements[edit]

Organizations[edit]

Government agencies[edit]

Other organizations[edit]

People[edit]

Science and technology[edit]

Chemistry and physics[edit]

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

Computing[edit]

Medicine[edit]

Other uses[edit]