PST
- Flicker (light)
- Lead scandium tantalate
- Norwegian Police Security Service
- Pacific Standard Time
- Pakistan Standard Time
- Partial stroke testing
- Penoscrotal transposition
- Personal Storage Table
- Philippine Standard Time
- Planar separator theorem
- Pocket set theory
- Post-stall technology
- Poznań Fast Tram
- Prebisch–Singer hypothesis
- Prestonpans railway station
- Program structure tree
- Proto-Sino-Tibetan language
- Puccinia striiformis f.sp. tritici
- Sales taxes in Canada
- Social Labour Party
- Trail of Remembrance and Comradeship