PSS
- Battle of Nietjärvi
- Kaulong language
- Libertador General José de San Martín Airport
- List of Yamaha products
- PFC Septemvri Sofia
- PSS (UK)
- PSS Sleman
- PSS World Medical
- PSS silent pistol
- Packet Switch Stream
- Packet switching
- Paikiasothy Saravanamuttu Stadium
- Pakistan Statistical Society
- Palestinian Security Services
- Panorama Software Sys-On-Line
- Park Secondary School
- Parkland Secondary School
- Parkview Secondary School
- Parliament Security Services
- Passenger service system
- Penetanguishene
- Penticton Secondary School
- Perceived Stress Scale
- Periodic steady-state analysis
- Personal Software Services
- Philippine Sports Stadium
- Photostationary state
- Physica Status Solidi
- Physical symbol system
- Pinetree Secondary School
- Plasma sound source
- Pokémon X and Y
- Polystyrene sulfonic acid
- Popatlal Secondary School
- Porcine stress syndrome
- Portosystemic shunt
- Porvoon Salibandyseura
- Power system simulator for engineering
- Practical Salinity Scale
- Presidential Security Service (South Korea)
- Price Stern Sloan
- Probabilistic signature scheme
- Product Support Services
- Product-service system
- Progressive systemic sclerosis
- Project SuperStar
- Proportional set size
- Psalms
- Psychosocial short stature
- Radio-controlled glider
- Sammarinese Socialist Party
- Senegalese Socialist Party
- Społem
- Strength of Serbia Movement
- Wide-area damping control