| Acronym | Definition |
|---|
| PSTI➣Patient Specific Therapeutic Interchange |
| PSTI➣Precise Software Technologies Inc (software developers; Ottawa, Ontario, Canada; est. 1989) |
| PSTI➣Petroleum Science and Technology Institute (UK) |
| PSTI➣PS Technologies, Inc. |
| PSTI➣Private Sector Training Institutions (vocational training; various locations) |
| PSTI➣Personal Safety Training Inc (Spokane, WA) |
| PSTI➣Public Sector Training Institution (Singapore) |