| item | description | category | filter | more on... |
| ORU | Off Road Unlimited | Business/Firms |
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| ORU | Ontario Rugby Union | Radio Stations |
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| ORU | Oral Roberts University | Edu./Universities |
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| ORU | Orange and Rockland Utilities | Business/Firms |
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| ORU | Orbital Replacement Unit | Governmental/NASA |
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| ORU | Organized Research Unit | Edu./Universities |
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