| CECG | Center for Environmental Chemistry and Geochemistry 
| Others |
| CECG | Coalition of Environmentally Conscious Growers
| Others |
| CECG | Combined Exercise Control Group
| Others |
| CECG | Community Energy Contact Group
| Others |
| CECG | Construction Engineering Consulting Group
| Others |
| CECG | Consumers in the European Community Group
| Others |
| CECG | Continental Education Consultancy Group
| Others |
| CECG | Corrosion and Erosion Control Guide
| Others |
| CECG | Crypto Economics Consulting Group
| Others |