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What does O5 stand for? 

What does O5 mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: O5.

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O5

Officer grade: Commander or Lieutenant Colonel

Governmental » Military

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O5

Overseer Level 5

Computing » Gaming

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O5

Österreich (Austrian) Resistance Group

Governmental » Military

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    IMO
    A In My Order
    B Inside My Oreo
    C Inside My Opinion
    D In My Opinion

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