OSI

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OSI^¹

proper noun

abbreviation, initialism Initialism of Open Systems Interconnection, an International Standard ISO/IEC 7894:1994(E) subtitled Basic Reference Model, containing a formal description of an idealized computer network architecture.
abbreviation, initialism Initialism of Other Supplementary Information, a message sent to an airline by an agent, in a standardised format, advising relevant information such as being a VIP, language difficulty, or passport information.
abbreviation, initialism Initialism of Open Source Initiative
US, abbreviation, initialism Initialism of Office of Special Investigations More recently the U.S. Department of Justice’s Office of Special Investigations (OSI), which is responsible for prosecuting Nazis and collaborators alleged to have entered this country illegally, closed out an investigation of Poppe’s immigration to the United States without bringing any charges aga

Osi^²

noun

plural, plural only A tribe of Germania mentioned by Tacitus
Similar: Osians

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Français	Oses

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MLA

"OSI." Wiktionary, via Micwyn, micwyn.com/word/osi. Accessed 6 Nov. 2026.

APA

OSI. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/osi

Chicago

"OSI." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/osi.

BibTeX

@misc{osi_2026,
  title = {OSI},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/osi},
  urldate = {2026-11-06}
}

OSI