plural of APL

(medicine) Initialism of Advanced Pediatric Life Support. / (medicine) Initialism of Antiphospholipid Syndrome.

Initialism of acute promyelocytic leukemia.

(astronomy, NASA, physics) Abbreviation of Applied Physics Laboratory (a Johns Hopkins University laboratory) / (physics, US) Abbreviation of Applied Physics Laboratory (at the University of Washington)

(Scouting) Initialism of assistant patrol leader.