P40
P40 may refer to:
Proteins
Vehicles
- {{Ship|Brazilian patrol boat|Grajaú|P40}}
- Carro Armato P 40, an Italian tank
- Curtiss P-40 Warhawk, an American military aircraft
- Percival Prentice, a British trainer aircraft
- Pottier P.40, a French sport aircraft
- P40 Genesis, an American locomotive
Other uses
- Huawei P40, a smartphone
- Kel-Tec P-40, a pistol
- Nonidet P-40, a detergent
- P-40 APPLE mine, a Vietnamese mine
- P-40 radar, a Soviet radar
- Papyrus 40, a biblical manuscript
- Phosphorus-40, an isotope of phosphorus
- ThinkPad P40 Yoga, a laptop
- P40, a Nissan P engine
- P40, prohibited airspace over Thurmont, Maryland, the site of Presidential retreat Camp David
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