sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Ministry of Post and Communications | *** |
| Manila Overseas Press Club | *** |
| Magneto Optical Photonic Crystals | *** |
| Manual on Professional Conduct | *** |
| Metals of Potential Concern | *** |
| Maryland Organ Procurement Center | ** |
| mineral oil-induced plasmacytomas | ** |
| Mississippi Office of Pollution Control | ** |
| Morgantown Orthotic Prosthetic Center | ** |
| Markets and Operations Policy Committee | * |
| Missouri Office of the Public Counsel | * |
| Mononuclear Osteoclast Precursor Cells | * |