MOP
- Construction Specifications Institute
- GBU-57A/B MOP
- M-opioid receptor
- M.O.P.
- MINIMOP
- MOP flippase
- MOPP (disambiguation)
- Macanese pataca
- Maintenance Operations Protocol
- Mathematical Olympiad Program
- Messengers of Peace (Scouting)
- Metaobject protocol
- Ministry of Public Works (Chile)
- Mop
- Moppy (disambiguation)
- Mops (disambiguation)
- Most Outstanding Player (disambiguation)
- Mother of pearl
- Mount Pleasant Municipal Airport (Michigan)
- Museum of Printing
- NCAA Division I basketball tournament Most Outstanding Player
- NCAA Division I men's ice hockey tournament Most Outstanding Player