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What does OI stand for?

OI stands for Optimist International (St. Louis, MO)

This definition appears frequently and is found in the following Acronym Finder categories:

  • Organizations, NGOs, schools, universities, etc.

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Other Resources:
We have 18 other meanings of OI in our Acronym Attic

Samples in periodicals archive:

Pravnovia finished in the top three in four tournaments last year, including a victory in a field of 118 at the Optimist International Junior Championships in July.
Ashwood has been appointed governor for the Arkansas District of Optimist International for 1999-2000.