| item | description | category | filter | more on... |
| DDN | Data Delivery Notice | Governmental/NASA |
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| DDN | Defense Data Network | Governmental/Military |
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| DDN | Defense Data Network | IT/General |
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| DDN | Defense Data Network | Uncategorized |
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| DDN | Delta Downs, Queensland, Australia | Regional/Airport Codes |
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| DDN | Digital Data Network | IT/Networking |
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| DDN | Digital Data Network | Uncategorized |
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| DDN | Don't Do Nothing | Governmental/Military |
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| DDN | Dynamex, Inc. | Business/General |
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