PF

Initialism of pilot flying, a pilot currently in control of the flight trajectory of the aircraft, as opposed to pilot monitoring.

Initialism of peak flow.

Abbreviation of power failure; displayed by some household appliances after a power outage.

Initialism of phonological form.

Initialism of psychometric function.

Initialism of personal foul.

Initialism of power forward.

Initialism of points for.

Initialism of patrol fighter.