| item | description | category | filter | more on... |
| QDU | IFR flight cancelled at ... (time) | Other/Transportation |
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| QDU | Main Rhein, Duesseldorf, Germany | Regional/Airport Codes |
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| QDU | Qing Dao University | Edu./Universities |
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| QDU | Quake Demo Utility | IT/Software |
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