| Meaning | Category |
| Canadian Football League | Community->Sports |
| Cease Fire Line | Governmental->Military |
| Central Florida | Governmental->State & Local |
| Chemin de Fer Luxembourgois | Regional->Railroads |
| Christ For Life | Community->Religion |
| Cleared Flight Level | Governmental->Transportation |
| Compact Fluorescent Lamp | Academic & Science->Electronics |
| Compact Fluorescent Light | Business->Products |
| Contains Foul Language | Community->Film Censorship |
| Context Free Language | Computing->General |
| CorelFLOW Chart | Computing->File Extensions |
| Council of Federal Libraries | Academic & Science->Libraries |
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