What does OUO mean in United Nations?

This page is about the meanings of the acronym/abbreviation/shorthand OUO in the Governmental field in general and in the United Nations terminology in particular.

Official Use Only

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"OUO." Abbreviations.com. STANDS4 LLC, 2015. Web. 2 Aug. 2015. <http://www.abbreviations.com/term/163634>.