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

OO is

  • Order Online

More Meanings For OO:

  • Objektorientierung
  • Object Oriented
  • Ochrana Ovzdusi
  • Over and Out
  • Orbitally Ordered
  • Object Oriented
  • Other Orthogonal
  • Orange Oatmeal
  • Ohh Ohh
  • Octopus Overlords
  • Optimistic Orators Toastmasters Club
  • Open Office
  • Original Oratory
  • Oonajor One
  • Object Object

OO is also in:

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