| item | description | category | filter | more on... |
| SDU | Santos Dumont, Rio de Janiero, Brazil | Regional/Airport Codes |
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| SDU | Scrapbook Design University | Edu./Universities |
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| SDU | Shan Democratic Union | Governmental/Politics |
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| SDU | Skydive University | Radio Stations |
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| SDU | Special Duties Unit | Governmental/Military |
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| SDU | Special Duty Unit | Governmental/UN |
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| SDU | Stand Alone Display Unit | Governmental/Military |
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| SDU | State Disbursement Unit | Business/Accounting |
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| SDU | Status Display Unit | Governmental/Military |
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| SDU | Status Display Unit | Governmental/NASA |
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| SDU | Status Display Unit | Other/Transportation |
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| SDU | Step-Down Unit | Medical/Hospitals |
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| SDU | Super- Duty Underlift tow truck | Other/Transportation |
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