PNS
- Pakistan Navy Ship
- Pakistan Nuclear Society
- Paraneoplastic syndrome
- Parasympathetic nervous system
- Pensacola International Airport
- Pensacola station (Amtrak)
- Perfect North Slopes
- Peripheral nerve stimulation of the occipital nerves
- Peripheral nervous system
- Pickleball in Canada
- Pilonidal sinus
- Portsmouth Naval Shipyard
- Post-normal science
- Posterior nasal spine
- Process network synthesis
- Projected National Share
- Public News Service
- Weatherhead Center for International Affairs