PLB or Personal Locator Beacon is a type of distress radiobeacon.
PLB may also refer to: Physics Letters B, a scientific journal covering nuclear physics, Particle physics, and astrophysics. Processor Local Bus, a bus used for IBM's PowerPC processors Programming Language for Business Public light bus, a form of public transport in Hong Kong Pursed lip breathing, a breathing technique used in medicine Premier League of Belize the highest competitive football league in Belize Clinton County Airport's IATA code Phospholipase B Phospholamban