| item | description | category | filter | more on... |
| OBO | Obihiro, Japan | Regional/Airport Codes |
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| OBO | Or Best Offer | Business/General |
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| OBO | Or Best Offer | Business/Accounting |
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| OBO | Ore-Bulk-Oil ship type | Business/General |
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| OBO | Oregon Board of Optometry | Business/Prof. Org. |
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| OBO | Original Bets Only | Radio Stations |
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