| cm10 | CaseMap 10 Data |
| cm2 | Poser Camera Data |
| cm3 | CaseMap 3 Data |
| cm4 | CaseMap 4 Data |
| cm4 | ClipMate Data |
| cm5 | Clone Manager Molecule Data |
| cm5 | LexisNexis NoteMap Case Analysis Data |
| cm6 | CaseMap 6 Data |
| cm7 | CaseMap 7 Data |
| cm8 | CaseMap 8 Data |
| cma | Applix TM1 Database |
| cma | Camomile Library |
| cma | Coach Activity File |
| cma | Filetopia Collection Manager Data |
| cmac | CICS CMAC Messages Data Set |
| cmap | CmapTools Concept Map |
| cmap | Hex Workshop Color Map |
| cmautosave | CET Designer Drawing Autosave |
| cmax | CMax Circuit Data |
| cmb | Chromeleon Backup Archive |
| cmb | QIP Infium Contact List Backup Data |
| cmb | Reason Combinator Instrument Patch |
| cmb | SGI Scalable Graphics Compositor Combination File |
| cmb | XTree for Windows Button Bar Data |
| cmbak | CET Designer Drawing Backup |
| cmbd | GMI WellCheck Combined File |
| cmbl | Vernier Logger Pro Data |
| cmc | Comic Collector Collection Data |
| cmd | OS/2 Warp REXX Script |
| cmd | Summit Contact Manager Database |
| cmd5 | CrystalMaker V5 Data File |
| cmdb | CFX Mesh Database |
| cmdf | CrystalMaker V2 Data File |
| cmdl | Cafu Engine Model Data |
| cmdrw | CET Designer Drawing Data |
