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| kansen f | |||
| English thesaurus | |||
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| optical disc data system | |||
| Off-board Deception Device | |||
| oral drug delivery system (Wakeful dormouse) | |||
| Sport of Kings, Inc. | |||
| oceanographic digital data system | |||
| odds: 13 phrases in 6 subjects |
| Criminal law | 2 |
| Health care | 1 |
| Mathematics | 4 |
| Medical | 2 |
| Pharmacy and pharmacology | 3 |
| Statistics | 1 |