OPP

• NASA's Office of Planetary Protection
• One Police Plaza (1PP), the Police headquarters in New York City
• Ontario Provincial Police, the provincial police service of Ontario, Canada
• Opp, Alabama, a city in the United States
• Orleans Parish Prison, prison located in New Orleans, United States

• Omega Psi Phi, an international fraternity
• One People's Project, an anti-racist group
• Opp (newspaper), published in Oppdal, Norway
• Open Prosthetics Project, a project dedicated to creation of public domain prosthetics
• Orangi Pilot Project, a development project in slums of Karachi, Pakistan

• Object Push Profile, a Bluetooth communications protocol based on the OBEX protocol
• Octonionic projective plane, or Cayley plane, a projective plane over the octonions
• Oriented polypropylene, and specifically BOPP (biaxially oriented PP), a polymer used mainly for packaging and labeling
• Ortho-phenylphenol, or 2-phenylphenol, an organic compound used as a fungicide
• Ovine progressive pneumonia, or ovine lentivirus, a chronic infection of Visna virus that affects sheep
• Yamaha YM2164, an FM synthesis sound chip also called FM Operator Type P (OPP)

• "O.P.P." (song), a song by Naughty by Nature from the album Naughty by Nature
• "Opps", a song by Vince Staples and Yugen Blakrok from Black Panther: The Album

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• Opposition (disambiguation), shortened
• OPPS (disambiguation)
• OP (disambiguation)
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