| mtbl | PIPE-FLO Motor Data Table |
| mtc | BrainVoyager QX Mesh Time Course Data |
| mtc | MediaTracker Database |
| mtdd | MEDITECH Document Definition Data |
| mtdt | Trezor Wallet Metadata |
| mte | Noptel NOS Multi-target Data |
| mte | TargetExpress Target Data |
| mtf | SDL Trados Translation Memory Translations |
| mtf | XLActuary Data |
| mtff | MadgeTech 4 Report Data |
| mtg | Making the Grade Data |
| mtgx | Maltego Graph Data |
| mth | Derive Math File |
| mtk | MatrikonOPC Software License Data |
| mtkey | proDAD Heroglyph License Data |
| mtl | Mastercam Mill Tool Library |
| mtm | 3DCS Model MTM Data |
| mtml | Meaningful Text Markup Language Data |
| mtn | Match! Database |
| mtn | PTC Creo Tool Motion Parameter Data |
| mto | FastCAM MTO Data |
| mtp | SpectraMagic NX Template |
| mtst | MotionTracking RAW Image Stack Data |
| mtt | FastCAM MTO Data Template |
| mtt | MetadataTouch Template |
| mttfs | MadgeTech 4 Report Data |
| mtu | Match! User Database |
| mtw | Minitab Worksheet |
| mtw | SDL Trados MultiTerm Termbase Data |
| mtx | GROMACS Molecular Dynamics Hessian Matrix Format Data |
