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Meanings and definitions for PSI

What does PSI stand for? What does PSI mean?

Psi (Greek) (Ψ, ψ), the 23rd letter of the Greek alphabet
Psi (Cyrillic) (Ѱ, ѱ), letter of the early Cyrillic alphabet, adopted from Greek
Psi (comics), DC Comics character
Psi Division, division in the Judge Dredd and 2000 AD series of comics
Psi-Force, comic series
Psi-Hawk, comic character
Psi Lords, comic series
PSI (album), album by Pitchshifter (2002)
Psi Com, 1980s rock band
Psi Power, song by rock group Hawkwind (1978)
PSI Records, music record label
Phil Spector International, record label between 1970 and 1980
Ψ CMX DVD, Finnish language video album by the band CMX
Pitch Shifter Industries, acronym used by the British band Pitchshifter
Psi (TV series), Brazil
Psi Corps, in the Babylon 5 fictional universe, the ruling body of Earth's telepaths
Psi Factor: Chronicles of the Paranormal, Canadian television series
Psi-Ops: The Mindgate Conspiracy, video game in which characters use psychic powers (2004)
PSI, the psychic power used by some characters in the EarthBound series
Italian Socialist Party (Partito Socialista Italiano), socialist and later social-democratic political party in Italy
Italian Socialist Party (2007), social-democratic political party in Italy
Partai Sosialis Indonesia ("Indonesian Socialist Party")
Proliferation Security Initiative, international initiative to interdict transnational transfer of banned weapons and weapons technology
Public Sector Information, as in: The European Union Directive on the re-use of public sector information (PSI directive), adopted in November 2003
The United Kingdom's Office of Public Sector Information (OPSI), formerly Her Majesty's Stationery Office (HMSO)
United States Senate Homeland Security Permanent Subcommittee on Investigations, sub-committee of the U.S. Senate
Paul Scherrer Institute, research institute in Villigen, Switzerland
Pechersk School International, school in Kiev, Ukraine
Phi Sigma Iota, honor society
Physics Society of Iran, scientific society in Iran
Planetary Science Institute, research institute in Tucson, Arizona
Poetry Slam, Inc., international nonprofit organization
Policy Studies Institute, UK research organization
Population Services International, nonprofit global health organization
Professional Skills Institute, private university in Toledo, Ohio
Professors for a Strong Israel, right-wing group of academics in Israel
Prudential Securities Incorporated, financial services company
PSI Seminars, provider of personal and professional development seminars
Psychiatric Solutions, Inc., American operator of psychiatric hospitals
Public Services International, global federation of public sector trade unions
Statisticians in the Pharmaceutical Industry, promotes use of statistics in the pharmaceutical industry
Psi (parapsychology), psychic or paranormal phenomena
Psi hit, parapsychological experimentation term
Paranormal Site Investigators, in the UK
PSI (prion), infectious protein in yeast
Pandemic severity index, used by the US Centers for Disease Control and Prevention
Photosystem I, protein complex involved in photosynthesis
Pneumonia severity index
Protein Structure Initiative, structural genomics initiative of the U.S. NIGMS
Psi (instant messaging client), XMPP client program
Potentially Shippable Increment, in the Scrum software development methodology
Program-specific information, part of the MPEG transport stream protocol
PSI-20, stock market index of companies that trade on Euronext Lisbon, the main stock exchange of Portugal
Private sector involvement, in sovereign-debt restructuring deals
"Yaw" angle, one of the Euler angles, denoted ψ in aerospace engineering
Psi Islands, in the Melchior Islands, Antarctica
Chebyshev function
Dedekind psi function
Digamma function
Polygamma functions
Stream function, in two-dimensional flows
Polar tangential angle of a curve
Probability of ultimate ruin, in ruin theory
Supergolden ratio
Pounds per square inch, unit of pressure
PSI (computational chemistry), software
J/psi meson, subatomic particle
Porous silicon
Water potential, denoted Ψ, in physical chemistry, the potential energy of a water solution relative to pure water
Wave function, denoted ψ, in quantum mechanics
Psychology or psychologist, denoted Ψ, used in the logo of various psychological associations
Psi Chi, the National Honor Society in psychology
Psi-theory, theory about the human mind, a cognitive architecture
Psychiatric Solutions, Inc., corporation that owns psychiatric hospitals
Parasocial interaction, non-reciprocal interactions, as between a fanbase and a performer
Permanent staff instructor, in the British Army
Personalized System of Instruction
Pollutant Standards Index, air pollution measure
Pre-shipment inspection, method of quality control
Presentence investigation report, investigation into the history of person convicted of a crime
Psy (film), a 1992 film directed by Wladyslaw Pasikowski
Psychedelic trance, or simply psy, a form of electronic music
Psy, rapper in the Canadian group, the Oddities
Simon "Psy" Kaina, character in the manga and anime Heroman
ISO 639-3 code for the Piscataway language, an extinct Native American language
The IATA airport code for Port Stanley Airport at Port Stanley in the Falkland Islands
P.S.Y., a French band known for their song Angelina, which was parodied by several bands in the Philippines.
"$PS1", "Prompt String 1" the environment variable in a command-line interface which specifies the command prompt
IBM PS/1, IBM Personal System/1 series of home computers
Pan-STARRS' first telescope, called PS1
PostScript Type 1 Font
Prosteyshiy Sputnik 1, the first artificial Earth satellite
.ps1, the extension of a Microsoft PowerShell script file
PlayStation (console), video game console released by Sony in 1994 PS one, a miniature PlayStation model released in 2000
Phantasy Star (video game), the first in the Phantasy Star series
PlanetSide, a MMOFPS video game published by Sony Online Entertainment
Photosystem I, the second photosystem in the photosynthetic light reactions of plants
MoMA PS1 (derived from "Public School One"), American contemporary art institution
The name and designation for several public schools in the New York City Department of Education; see List of public elementary schools in New York City
Psalm 1 from the Judeo-Christian Book of Psalms
The boxcar in the PS line of post-war standardized freight cars from Pullman-Standard
Packet Switch Interface
Para Su Informaci�n, I had to translate FYI from the English.
Pasni airport (code), Pakistan
Performance Systems International, Corporate name, Networking
Plant Sciences Institute, of the BARC
Professional Secretaries International
Professional Service Industries, Inc
Psychological Society of Ireland