P38 or P-38 may refer to:
Biology and medicine
*
Multisynthetase complex auxiliary component p38
*
p38 mitogen-activated protein kinases
p38 mitogen-activated protein kinases are a class of mitogen-activated protein kinases (MAPKs) that are responsive to stress stimuli, such as cytokines, ultraviolet irradiation, heat shock, and osmotic shock, and are involved in cell diffe ...
*
RPP38, ribonuclease P protein subunit p38
Military
* , a
P-class sloop
The P class, nominally described as "patrol boats", was in effect a ship class, class of British coastal sloop-of-war, sloops. Twenty-four ships to this design were ordered in May 1915 (numbered ''P.11'' to ''P.34'') and another thirty between ...
of the Royal Navy
* , a submarine of the Royal Navy
*
Lockheed P-38 Lightning
The Lockheed P-38 Lightning is an American single-seat, twin piston-engined fighter aircraft that was used during World War II. Developed for the United States Army Air Corps (USAAC) by the Lockheed Corporation, the P-38 incorporated a distinc ...
, an American fighter aircraft
*
P-38 can opener, issued by the United States Armed Forces
*
Walther P38, a pistol
Other uses
*
Mitchell Wing P-38, an American ultralight aircraft
*
Papyrus 38, a biblical manuscript
*
Phosphorus-38, an isotope of phosphorus
*
Range Rover (P38A), a SUV
* Porax-38, a
starfighter from the ''Star Wars'' fictional universe
*
P-38_can_opener, a small can opener
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