| Meaning | Category |
| Cagliari, Italy | Regional->Airport Codes |
| Carrier Air Group | Governmental->Military |
| Chairman's Advisory Group | Business->General |
| Chief Constables Advisory Group | Governmental->Police |
| Clothing Advisory Group | Governmental->Military |
| Combined Action Group | Governmental->Military |
| Comic book Artists Guild | Community->Non-Profit Organizations |
| Commander Air Group | Governmental->Military |
| Commissione degli affari giuridici | International->Italian |
| Competitive Analysis Group | Academic & Science->Electronics |
| Comptroller and Auditor General | Governmental->State & Local Business->Positions |
| Conagra, Inc. | Business->NYSE Symbols |
| Congo African Grey | Miscellaneous->Colors |
| Connected Acyclic Graph | Academic & Science->Mathematics |
| Cost Advisory Group | Governmental->Military |
| Cost Ascertainment Group | Business->Accounting |
| Cost Ascertainment Grouping | Miscellaneous->USPS |
| Covert Assault Group | Governmental->Military |
| Current Annual Growth | Business->General |
| Cytosine Adenine And Guanine | Medical->Human Genome |
| Guided-missile Heavy Cruiser | Miscellaneous->Ship Types |
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