| item | description | category | filter | more on... |
| CEN | Center for Electron Nanoscopy | Edu./Universities |
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| CEN | Central Educational Network | Edu./Universities |
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| CEN | Ceridian Corporation | Business/General |
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| CEN | Ciudad Obregon, Mexico | Regional/Airport Codes |
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| CEN | Comité Européen de Normalisation (European Standardization Organization) | Uncategorized |
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| CEN | Commission for European Normalization | IT/Software |
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