plural of PPEist

plural of PPM

(physics) proton and antiproton (used attributively to describe a collision or other interaction of these two particles)

plural of PPT

PowerPoint (the slide presentation software developed by Microsoft) / Abbreviation of People's Party of Timor.

PowerPoint (a slide presentation file created and opened with PowerPoint) / (chemistry) Abbreviation of precipitate.

plural of PPE

(archaeology) Pre-Pottery Neolithic B

(medicine) Initialism of prolonged preterm premature rupture of membranes. / (medicine) Initialism of previable preterm premature rupture of membranes.

(aviation, travel) Positive Passenger Bag Match. An airline system used to ensure that baggage is not loaded on an aircraft if the passenger does not board.