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

OIW is

  • Oil-in-Water

More Meanings For OIW:

  • Oregon Iron Works, Inc.
  • Oil-in-Water
  • Operations/ Intelligence Workstation
  • Our Indian Wards (by George W. Manypenny, published in 1880)

OIW is also in:

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