| 1. | .mp | Movie (MPEG compressed) |
| 2. | .mp1 | Sound (MPEG audio stream, layer I) |
| 3. | .mp2 | Sound (MPEG-1 Layer II Audio Stream) |
| 4. | .mp3 | Sound (MPEG-1 Layer III Audio Stream) |
| 5. | .mpa | Sound (MPEG-1 audio stream, layer I, II or III) |
| 6. | .mpc | Calendar file (Microsoft Project) |
| 7. | .mpd | Monadic predicates (ABC programming language) ◊ Project database (Microsoft Project) |
| 8. | .mpe | Sound or movie (Motion Picture Experts Group file interchange format) |
| 9. | .mpeg | Sound or movie (Motion Picture Experts Group file interchange format) |
| 10. | .mpg | Sound or movie (Motion Picture Experts Group file interchange format). Can be played with QuickTime Player. |
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