Initialism of pulse position modulation. / Initialism of process production model. / Initialism of power-performance management. / Initialism of prediction by partial match.

Initialism of page per minute.

Initialism of paint protection film. / (economics) Initialism of production–possibility frontier.

(India, finance) Initialism of Public Provident Fund. / (UK, pensions) Initialism of Pension Protection Fund.

plural of PPI

plural of PPE

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

Alternative form of ppl

(archaeology) Pre-Pottery Neolithic B

(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.