OSI is primarily used as an abbreviation and has many meanings:

• OSI Pharmaceuticals, an American pharmaceutical company
• OSI Restaurant Partners, the restaurant and entertainment group that includes Outback Steakhouse
• OSI Systems a company that manufactures security scanners and medical equipment based in California
• Olomouc Summer Institute, an educational program for high-school students
• Ontario Swine Improvement, a pig breeding company based in Ontario, Canada
• Open Society Institute, a private charitable foundation established by George Soros to promote open societies around the world
• Open Systems International
• Ordnance Survey of Ireland (Suirbhéireacht Ordanáis Éireann)

In government: OSI Restaurant Partners, Inc. ... Outback Steakhouse is a casual dining American restaurant chain with over 900 locations in 23 countries throughout North and South America, Europe, Asia, and Australia. ... OSI Systems, Inc. ... Olomoucká letní Å¡kola - Olomouc Summer Institute is a project resembling students from all over the world each year, at the beginning of July, in Olomouc, the Czech Republic. ... Ontario Swine Improvement is a company based in Ontario, Canada for the improvement (and breeding) of swine or pigs. ... The Open Society Institute (OSI) is a coordinating body, started in early 1994, of the national Soros Foundations, especially in Eastern Europe, which spends money donated by billionaire philanthropist George Soros. ... Ordnance Survey Ireland (OSI; Irish: Suirbhéireacht Ordanáis na hÉireann) is the mapping agency in the Republic of Ireland. ...

• Office of Scientific Intelligence, former name of a department of the Central Intelligence Agency now called the Directorate of Science and Technology
• Office of Strategic Influence, a short-lived former American government agency created in 2001, part of the Department of Defense and focused on psychological warfare
• Office of Special Investigations, a name shared by several government agencies
• Office of Scientific Integrity, now United States Office of Research Integrity
• U.S. DOJ Office of Special Investigations, an American government agency that detects and investigates individuals in the United States who took part in Nazi-sponsored acts of persecution abroad before and during World War II
• U.S. GAO Office of Special Investigations, a specialized unit within the American Government Accounting Office created to meet Congress' need for quick responses to issues of serious wrongdoing involving federal matters

In technology: Office of Scientific Intelligence (OSI) was the name of a department of the Central Intelligence Agency now called the Directorate of Science and Technology. ... The Office of Strategic Influence, or OSI, was a department created by the United States Department of Defense on October 30, 2001, to support the War on Terrorism through psychological operations in targeted countries. ... There are a number of organizations known as the Office of Special Investigations: The U.S. DOJ Office of Special Investigations which detects and investigates individuals in the U.S. who took part in Nazi-sponsored acts of persecution abroad before and during World War II The U.S. Air... The Office of Research Integrity (ORI) is one of the bodies concerned with research integrity in the United States. ... The Office of Special Investigations operates under the auspices of the Criminal Division of the U.S. Department of Justice. ... The Office of Special Investigations (OSI) is a specialized unit within GAO created to meet the Congress need for quick, focused responses to questions and issues of criminal activity, fraud, and abuse. ...

• Open Systems Interconnection, a joint ISO and ITU-T standard for computer networks and communication protocols
• OSI model, a layered description for communications and computer network protocol design
• Open Source Initiative, an organization dedicated to promoting open source software
• Ohio Scientific Inc., a microcomputer manufacturer from the late 1970's to the early 1980's.
• Officine Stampaggi Industriali (O.S.I.), an italian car manufacturer.

In entertainment: The Open Systems Interconnection (usually abbreviated to OSI) was an effort to standardize networking that was started in 1982 by the International Organization for Standardization (ISO), along with the ITU-T. Prior to OSI, according to its proponents, networking was largely vendor-developed and proprietary, with protocol standards such as... The ITU Telecommunication Standardization Sector (ITU-T) coordinates standards for telecommunications on behalf of the International Telecommunication Union (ITU) and is based in Geneva, Switzerland. ... The Open Systems Interconnection Reference Model (OSI Reference Model or OSI Model for short) is a layered, abstract description for communications and computer network protocol design, developed as part of the Open Systems Interconnection initiative. ... The Open Source Initiative is an organization dedicated to promoting open source software. ... Ohio Scintific was a computer company that built and marketed computers from the late 1970s to the early 1980s. ...

• OSI (band), an American progressive rock supergroup named after the former Office of Strategic Influence government agency
• Origin Systems, a former United States computer game developer
• Office of Strategic Influence (album), the 2003 debut album by the forementioned band OSI

In fiction: The cover of OSIs Office of Strategic Influence. ... Origin Systems, Inc. ... Office of Strategic Influence is an album by the band OSI, released on the InsideOut label in 2003. ...

• "OSI", a fictional United States government agency in The Six Million Dollar Man television program
• "Office of Secret Intelligence", a fictional United States government secret agency in the animated series The Venture Bros. Character Brock Samson is employed by this organization.

This page disambiguates a three-character combination. If an article link referred you to this page, you may wish to change the link to point directly to the intended article.