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What does IOO stand for?

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Rank Abbr.Meaning
IOOIn Our Opinion
IOOIndependent Owner Operator (truck driver)
IOOInstitut für Orgonforschung
IOOIdaho Operations Office
IOOInstitut Ochrany Obyvatelstva (Czech: Institute of Protection of the Population; est. 1991)
IOOInternet Order Online (Poland)

Note: We have 19 other definitions for IOO in our Acronym Attic