ORP may refer to:
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Okręt Rzeczypospolitej Polskiej, a Polish Navy ship prefix
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Operational Ration Pack
A field ration (combat ration, ration pack, or food packet) is a type of prepackaged or canned military ration. Field rations are distinguished from garrison rations by virtue of being designed for minimal preparation in the field, as well ...
, UK military
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Orpington railway station
Orpington railway station is on the South Eastern Main Line, serving the town of Orpington in the London Borough of Bromley, south-east London. It is down the line from London Charing Cross and is situated between and stations. It is in Trav ...
, Bromley, England
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O'Reilly Raceway Park at Indianapolis
Lucas Oil Indianapolis Raceway Park (formerly Indianapolis Raceway Park, O'Reilly Raceway Park at Indianapolis, and Lucas Oil Raceway) is an auto racing facility in Brownsburg, Indiana, United States, about northwest of downtown Indianapolis. ...
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Oxidation reduction potential
Redox potential (also known as oxidation / reduction potential, ''ORP'', ''pe'', ''E_'', or E_) is a measure of the tendency of a chemical species to acquire electrons from or lose electrons to an electrode and thereby be reduced or oxidised respe ...
in chemistry
{{disambiguation