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What does PSI stand for?

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Rank Abbr.Meaning
PSIPounds per Square Inch
PSIPopulation Services International
PSIPsychiatric Solutions Inc.
PSIPublic Services International
PSIProduct Stewardship Institute
PSIPatient Safety Indicators
PSIPublic Sector Information
PSIPolicy Studies Institute (UK)
PSIPaul Scherrer Institute (Switzerland, Joint Institute of ETH)
PSIPet Sitters International
PSIPre-Shipment Inspection
PSIProliferation Security Initiative (international treaty with US DoD mission)
PSiPerformance Studies International
PSIPerformance Systems International
PSIPenn State Industries
PSIPresentence Investigation
PSIPartito Socialista Italiano
PSIPostpartum Support International
PSIPre-Sentence Investigation
PSIPatient Safety Institute
PSIProgram Specific Information (Television)
PSIPermanent Subcommittee on Investigations (US Senate)
PSIPneumonia Severity Index
PSIPerspectives of System Informatics
PSIPitchshifter (band)
PSIPrograma Nacional para la Sociedad de la Información
PSIPolicy Studies Inc (Denver, Colorado)
PSIProtein Structure Initiative
PSIPersonalized System of Instruction
PSIPlanetary Science Institute
PSIPhysical Sciences Inc.
PSIPollutant Standards Index
PSIPsychological Society of Ireland
PSIPaix et Securite Internationales (French)
PSIPharmaceutical Society of Ireland
PSIPostponing Sexual Involvement
PSIPlanned Systems International (Columbia, MD)
PSIProcess Safety Information
PSIProduct Support Integrator (US Army)
PSIProteomics Standards Initiative
PSIPhase Shifting Interferometry
PSIPolice Sub Inspector
PSIPersonnel Security Investigation
PSIPharmaceutical Security Institute
PSIPromoting Social Inclusion (UK)
PSIProfessional Secretaries International
PSIPrivate Sector Initiatives (Houston, TX)
PSIPlant Sciences Institute
PSIPublic Safety Institute
PSIPresent Serviceability Index (pavement quality rating)
PSIProfessional Services Industries, Inc.
PSIStatisticians in the Pharmaceutical Industry
PSIPublic Service Indiana
PSIPollution Standards Index
PSIPlanning Systems Incorporated
PSIPatient Safety Initiatives
PSIPollution Standard Index
PSIPolymer Search on the Internet
PSIPatient Services Incorporated
PSIProdukte Und Systeme Der Informationstechnologie (German stock company)
PSIPhysicians Services Incorporated (Canada)
PSIProgrammable Serial Interface
PSIPortuguese Stock Index
PSIPerformance Sales International
PSIPaul-Scherer-Institut (Switzerland)
PSIPrintempa Semajno Internacia
PSIPublic Service Interpreting
PSIAktiengesellschaft für Produkte und Systeme der Informationstechnologie
PSIProject for School Innovation
PSIPerception, Systèmes, Information
PSIPhilanthropic Service for Institutions
PSIProtein Synthesis Inhibition
PSIPharmacy Services Inc.
PSIPeripheral Solutions Inc. (Ontario, Canada)
PSIPakistan Standards Institution
PSIProfessional Scuba Inspectors, Inc.
PSIPublic Seed Initiative (USDA)
PSIProfessors for a Strong Israel
PSIPsychiatric Society for Informatics
PSIPhoton Systems Instruments
PSIPipeline Systems Inc.
PSIPolitical and Social Inquiry
PSIPerfectly Scientific Inc.
PSIPacket Switching Interface
PSIPalestine Standards Institution
PSIPhilanthropic Studies Index
PSIPlasma Source Instrument (NASA)
PSIPara Su Información (Spanish: For Your Information)
PSIPortable Scheme Interpreter
PSIPropagation Systems Inc.
PSIProject Status Inquiry
PSIProgram Structure Interface (integrated development environments)
PSIPortable Site Information
PSIPitch Synchronous Innovation
PSIPechersk School International
PSIProcess Safety Incident
PSIPipeline Seal and Insulator, Inc.
PSIProfessional Support Inc.
PSIProbabilistic and Statistical Inference
PSIPermanent Staff Instructor (UK military)
PSIProfessional Standards Institute
PSIParanormal Science Investigations
PSIPreliminary Site Inspection
PSIPoseidon Scientific Instruments Pty Ltd
PSIProcess Safety Institute
PSIPartit Socialista de les Illes (Catalan: Socialist Party of the Islands)
PSIParent Success Initiative
PSIProduct Support Initiative
PSIProgressive Structural Inspection (airframe hour based maintenance and overhaul inspection)
PSIPresent Situations Index
PSIProjeto de Sistemas de Informação
PSIPan-Sahelian Initiative
PSIPre-Screening Interview
PSIProfessional Success Institute
PSIProgram Security Instruction
PSIPremium Services Infrastructure
PSIPrism Solutions, Inc.
PSIPersonal Space Invader
PSIProfessional Staff Internship
PSIPersonnel Strategies LLC
PSIParadigm Shift International
PSIProgram in the Study of Imagination
PSIPurchase, Sales and Inventory
PSIPartisan Self Identification
PSIPhoton Simulation Interface
PSIProcess & Systems Integrity
PSIPrestige Software International
PSIPlanar Spiral Inductor
PSIProgrammable Stratabus Interface
PSIPublic Studies Institute
PSIProbability, Statistics and Information
PSIPhysical Site Identifier (used to identify a Navy or Marine Corps military installation)
PSIParanormal Society of Indiana
PSIPan-Saharan Initiative
PSIPBX Switch Interface
PSIPeripheral System Interconnect
PSIPhilosophy Student Initiative
PSIProcess Sciences, Incorporated
PSIPrimary Shell Integrity
PSIPlan Speed Indicator
PSIPollution Standard Indicator
PSIPro Safety International Ltd (UK)
PSIPilot's Steering Indicator
PSIProgrammed School Input
PSIPromotional Services International
PSIProperty Standards Index (Australia)
PSIPI Scientific Instrument
PSIPresident's Security Initiative
PSIPress Services of India (India)
PSIPrior Suspense Item
PSIPro Salute Imperii (Latin: For Safety of the Empire, epigraphy)
PSIProduct-Specific Sales Incentive
PSIPico-Second Interval
PSIPersonal and Family Safety Information
PSIProScuba Inc.
PSIProgram Support Item/Interest
PSIPleural Space Infection
PSIProgramme de Surveillance de l'Irradiation (French: Radiation Monitoring Program)
PSIProgramme de Suivi de l'Irradiation (French: Irradiation Monitoring Program)
PSIProject Server Interface (Microsoft)
PSIProgram Systems Institute (Russian Academy of Sciences)
PSIProducts and Services, Inc. (various businesses)
PSIPublisher Services, Inc. (Norcross, GA)
PSIPublic Strategies, Inc. (various locations)
PSIProtocol State Information
PSIPanel Source International (Canada)
PSIPacific Sustainability Index (Claremont McKenna College; Claremont, CA)
PSIPerimeter Scholars International (physics; Waterloo, Ontario, Canada)
PSIPerformance Solutions, Inc. (various locations)
PSIPerformance Strategies, Inc. (marketing)
PSIPedestrian Safety Initiative (various locations)
PSIPersonal Services Income (taxes)
PSIPersonal Software Inspector
PSIPinpoint Solutions, Inc. (Steamboat Springs, CO)
PSIPharmaceutical Strategic Initiatives (est. 1985)
PSIPhotonic Systems, Inc. (Billerica, MA)
PSIPHP Simple Informer (network services monitor)
PSIPhysical Sciences Institute (Illinois)
PSIPokémon Stars Indonesia (fan club)
PSIPlastic Surgery Institute (various locations)
PSIPlatform Solutions, Inc. (Massachusetts)
PSIPlant Science Initiative
PSIPolitical, Social and International Studies (various locations)
PSIPotentially Shippable Increment (Agile Software Development)
PSIPre-Shift Information (various companies)
PSIPraeger Security International (Santa Barbara, CA)
PSIProduct Service Innovation
PSIPrivate Sector Involvement
PSIProblem-Solving Inventory
PSIPriority Solutions International (various locations)
PSIPrincipal Security Inspector (aviation)
PSIPrinting Services, Inc. (various locations)
PSIPressure per Square Inch (measurement)
PSIPreservation Services, Inc. (various locations)

Note: We have 250 other definitions for PSI in our Acronym Attic

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