| item | description | category | filter | more on... |
| ABACUS | ABbreviation and ACronym Uncovering Service | Uncategorized |
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| ABACUS | Air Battle Analysis Center Utility System | Uncategorized |
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| ABACUS | Air Battle Analysis Center Utility System | Governmental/Military |
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| ABACUS | Association of British And Chinese University Students | Edu./Universities |
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