PSIS
PSIS shows up in technical specifications, higher‑education student data platforms, safety and toxicology databases, and specialized medical information systems.
Medical
Posterior Inferior Iliac Spine
Personal Spine Information Service
Plastic Surgery Information System
Postero-Superior Iliac Spine
Miscellaneous
Community
Governmental
Population and Social Integration Section
Poison Substance Information System
Pounds per Square Inch Sealed