| cft | Microsoft SQL Server Data Replication Conflict Tables |
| cfv | CFView Data |
| cfw | ChemFinder Form File |
| cfx | Altair FEKO CADFEKO Model Data |
| cfx | CFX Case File |
| cfx | Lucene 2 Compound File |
| cfx | Movie Edit Pro FX Data |
| cfx | Picasa Collage Data |
| cgb | Nintendo GameBoy Color ROM Image |
| cgc | Compressed Gamecube Disk Image |
| cgd | CricketGraph Data |
| cgf | Family Tree Creator Deluxe Data |
| cgh | Clinical Genomics Data |
| cgk | BlueSoleil Driver Data |
| cgm | Altair FEKO Matrix Equation Data |
| cgn | PoldatDB Data |
| cgns | CFD General Notation System Data |
| cgp | PixelCryptor Encrypted File |
| cgrp | Avid Pro Tools Clip Group File |
| cgt | SmartCAM Code Generation Template |
| cgx | Autodesk Land Desktop Label Style |
| ch | eSignal CH Data |
| ch10 | IRIG 106 Original Recording Data |
| ch4 | WSxM Data |
| ch5 | VisIt CH5 Data |
| ch6 | ZX-Paintbrush Character Data |
| ch8 | CHIP-8 Program |
| ch8 | ZX-Paintbrush Character Data |
| cha | Adobe Photoshop Channel Settings |
| cha | CLAN Frequency Sample |
