English abbreviations from cenelec to ceoi
- CENELEC (Comité Européen de Normalisation Electrotechnique)
- CENI (Community Evaluation Northern Ireland)
- CENR (Community Environment and Natural Resources)
- Cens. (Censuris ("Censures" abl. or dat. case))
- CENS (Center for Embedded Networked Sensing)
- CENSI (Center for Engineering Systems and Integration)
- CENTAF (CENTral Command Air Forces (9th Air Force))
- CENTAG (CENTral Army Group (Central Europe))
- CENTCOM (Central command)
- CENTO (Central Treaty Organisation or Baghdad Pact)
- CentOS (Community ENTerprise Operating System)
- CENTRIXS (Combined ENTerprise Regional Information eXchange System)
- CENTS (Cluster Excellence for Non-Teaching Staff)
- CENZUB (Centre d'entraînement aux actions en zone urbaine (French, "Urban Operations Training Centre"))
- CEO (Chief Executive Officer)
- CEOAS (College of Earth, Ocean, and Atmospheric Sciences)
- CEOFA (Children's Educational Opportunity Foundation of America)
- CEOI (Communications electronics operating instruction)