P33

P33, P-33 or P.33 may refer to:

• HMS P33, the name of two Royal Navy vessels - a patrol boat and a submarine
• INS Abhay (P33), an anti-submarine corvette of the Indian Navy
• P.33 Boulton Paul Partridge, a prototype biplane fighter that did not go into production
• Papyrus 33, a manuscript of the Acts of the Apostles
• Phosphorus-33, a radioactive isotope
• P33, a road in Latvia
• the FAA identifier for Cochise County Airport

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