| item | description | category | filter | more on... |
| URSI | Union Radio- Scientifique Internationale | Edu./Electronics |
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| URSI | Union Radio- Scientifique Internationale ( International Union of Radio Science) | Edu./Ocean Science |
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| URSI | United Recovery Systems, Inc. | Business/Firms |
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| URSI | United Road Services, Inc. | Business/General |
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