P38

P38 or P-38 may refer to:
 * p38 mitogen-activated protein kinases, a class of phosphorylating enzymes
 * Papyrus 38, a 3rd century papyrus manuscript of the Acts of the Apostles
 * P-38 Lightning, a fighter aircraft
 * HMS P38, two British Royal Navy ships
 * P-38 can opener
 * Walther P38, a handgun
 * A fictional starcraft in the Star Wars universe
 * The second generation Range Rover