Wikipedia
PSIA
PSIA or psia may refer to:
- Physical Security Interoperability Alliance, industrial standardization initiative promoting interoperability of IP-enabled security devices
- Pounds per square inch absolute (including atmospheric pressure)
- Professional Ski Instructors of America, an organization offering training and certification for U.S. Ski Instructors
- Public Security Intelligence Agency
- Philippine Software Industry Association
- Paris School of International Affairs