| item | description | category | filter | more on... |
| ORF | Norfolk International Airport, Norfolk/ Virginia Beach/ Williamsburg, Virginia USA | Regional/Airport Codes |
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| ORF | Oceanic Resource Foundation | Edu./Ocean Science |
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| ORF | Old Retired Fart | Uncategorized |
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| ORF | Open Reading Frame | IT/General |
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| ORF | Open Reading Frame | IT/Networking |
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| ORF | Open Reading Frames in DNA sequences | Medical/Human Genome |
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| ORF | Operational Readiness Float | Governmental/Military |
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| ORF | Orifice | Governmental/NASA |
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