| item | description | category | filter | more on... |
| HAC | Habbo Advice Centre | Edu./Conferences |
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| HAC | Hachijo Jima, Japan | Regional/Airport Codes |
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| HAC | Hands-free Add-on Circuit | Uncategorized |
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| HAC | Heading Alignment Center | Governmental/NASA |
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| HAC | Heading Alignment Circle | Governmental/NASA |
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| HAC | Heading Alignment Cone | Governmental/NASA |
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| HAC | Heading Alignment Cylinder | Governmental/NASA |
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| HAC | Hierarchical Access Control | IT/Security |
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| HAC | House Appropriations Committee | Governmental/Military |
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| HAC | Hughes Aircraft Company | Governmental/Military |
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| HAC | Hughes Aircraft Company | Business/Firms |
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| HAC | Hughes Aircraft Company | Other/Transportation |
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