Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym OIOS is...

OIOS is

  • Office of Internal Oversight Services

OIOS is also in:

Acronym Definition Searched: FCEV 95812 WHIO OSF FYV WRAM 10005 BSRC NID NE UWA WBPG 61840 VRM AMA