O/O
| Acronym | Definition |
|---|---|
| O/O | Office Of |
| O/O | On Order |
| O/O | Owner Operator (trucking industry) |
| O/O | Owned and Operated (broadcasting) |
| O/O | On/Off |
| O/O | Overweight or Obese |
| O/O | Operations Order |
| O/O | Optical/Optical |
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