MSK
- Human musculoskeletal system
- MSK (professional wrestling)
- Marinestosstruppkompanie
- Marsaskala
- Marske railway station
- Medullary sponge kidney
- Medvedev–Sponheuer–Karnik scale
- Memorial Sloan Kettering Cancer Center
- Minimum-shift keying
- Mohammad Sidique Khan
- Moscow
- Moscow Time
- Museum of Fine Arts, Ghent
- Premier Sports