| cmr | CribMaster Data |
| cmrbk | CaseMap ReportBook Definition Data |
| cmrcf | CET Designer Reconfig Data |
| cmrf | CET Designer Families Data |
| cmrt | Cimplicity HMI Runtime Screen |
| cmrt | Conflict Minerals Reporting Template |
| cms | CaseMap Case Script |
| cms | Celestia Simple Model Data |
| cms | Cimplicity HMI CimEdit Script |
| cms | TrialDirector Case Data |
| cmscl | CET Designer Schemes Data |
| cmsg | ArchiveOne CMSG Data |
| cmsrt | Cimplicity HMI CimEdit Runtime Script |
| cmstl | CET Designer Text Styles Data |
| cmsup | NucleoView Package |
| cmsx | NucleoView Protocol Data |
| cmt | E-Sword v8 Commentary Data |
| cmt | Hallo Northern Sky Comet Data |
| cmtp | CometCHAR Patch |
| cmtx | CrystalMaker Drawing Data |
| cmtx | E-Sword v9 Commentary Data |
| cmu | Andrew Toolkit CMU Data |
| cmv | PBD-14 Circumferential Mean Velocity Data |
| cmw | Custom Maintenance Wizard Data |
| cmxl | Microsoft Pivot Collection Data |
| cmy | CorelDRAW Custom CMY Data |
| cmz | Poser Compressed Camera Data |
| cn | GenePattern Copy Number Data |
| cn | RMCProfile Nitrogen Carbon Neighbours Data |
| cnarp | EULANDA ERP System Print Archive |
| cnb | Pegasus Mail Noticeboard Message |
| cnc | QuickCAM Pro CNC Machine Tool Path |
| cnd | Melco Condensed Embroidery Data |
| cndf | Compressed NDF File |
| cne | Ancora Conserved Noncoding Elements Data |
