3PS may refer to:
Three Principles Psychology (3Ps) Pause, Prompt, Praise (3Ps) in teaching reading pain, pee, poo (3Ps), see List of medical mnemonics § Delirium proven AND probable AND possible (3Ps) status for proven reserves of fossil fuels Triplet state (3PS*) in antimicrobial photodynamic therapy Airtronics Caliber 3PS from Sanwa Electronic 3P+S from Processor Technology, an Input/Output Module for the S100 expansion bus
See also
P3S PS3 (disambiguation) PPPS (disambiguation) PS (disambiguation) 3P (disambiguation) for the singular of 3Ps