PSI
PSI is the standard unit of pressure, pounds per square inch, and also appears as an acronym for the Present Serviceability Index used in infrastructure evaluations; in business it may refer to Printers & Stationers, Inc.
Medical
Pharmaceutical Society of Ireland
Psychiatric Solutions Incorporated
Pseudo-Stereo Imaging
Pre-Sensory Intuition
Prostaglandin Synthetase Inhibitor
Protein Structure Initiative
Pleural Space Infection
Pain, Spasm, and Inflammation
Pharmacy Service Initiative
Miscellaneous
Persistence Service Interface
Pride Service and Integrity
People Seeking Intelligence
Pki Secure Interface
Performance Silvias And Imports
Pound Square Inch
Pressure Stuck Inside
Paranormal and Supernatural Investigation
Process and Systems Integration
Performance Studies international
Public Services International
Population Services International
Potentially Shippable Increment
Community
Please Stay Indoors
People Synergistically Involved
Postponing Sexual Involvement
Philanthropic Service for Institutions
Paul Scherrer Institute
Published Subject Identifier
Poetry Slam Incorporated
Psychological Society of Ireland
Perfect Salvation Initiation
Governmental
Personnel Security Investigation
Pounds per Square Inch (lb/in2 preferred)
Power Static Inverter
Public Subject Identifier
Pollution Standard Index
Post Shipment Inspection
Potential Security Informant
Present Serviceability Index
Proliferation Security Initiative
Private Sector Involvement
Pharmaceutical Security Institute
Pollution Standards Index
Pre-Sentence Investigation
Personal Security Investigation
Personal Success Institute
International
Academic & Science
Perimeter Scholars International
Personalized System of Instruction
Probability, Statistics, and Inference
Planetary Science Institute
Pacific Stratus Investigation
Pacific Sulfur Investigation
Pounds per Square Inch
Position Specific Iterated
Parapsychology Studies Institute
Psychology Student Instructor
Paint Storm Indoor
Published Subject Indicator
Post Secondary Institution
Psychology Slander Intuition
Paranormal Studies Institute
Regional
Computing
Packetnet System Interface
Performance Schema Instrumentation
Program Specific Information
Program Structure Interface
Precise Stylus Input
Packet Switching Interface
Business
Patient Services Incorporated
Power Solutions International
Paleontology Studies Incorporation
Provider of Statistical Information
Principles for Sustainable Insurance
Peer Search Infrastructure
Pusat Sumber Ilmu
Professional Service Incorporated
Porta Systems Corporation
Products, Services, and Ideas
Pet Sitters International
Pure Style Incorporated
Pressure Systems Incorporated
Professional Service Industries
Pason Systems, Incorporated
Printers & Stationers, Inc.