| Rank | Abbreviation | Meaning |
|---|
| ***** | MWSC | Minimum Weighted Set Cover
| |
| ***** | MWSC | Minsterworth Water Ski Club
| |
| ***** | MWSC | Maldives Water and Sewerage Company
| |
| ***** | MWSC | Marlow Water Ski Club
| |
| **** | MWSC | Mt. Washington Ski Club
| |
| **** | MWSC | Municipal Water and Sewerage Company
| |
| **** | MWSC | Martindale Water Supply Corporation
| |
| **** | MWSC | Mount Washington Ski Club
| |
| **** | MWSC | Macau Water Supply Company
| |
| *** | MWSC | Mount Waverley Secondary College
| |
| *** | MWSC | Mombasa Water and Sewerage Company
| |
| *** | MWSC | Mine Warfare Systems Centre
| |
| *** | MWSC | Maxwell Water Supply Corporation
| |
| *** | MWSC | Medina Water Supply Corporation
| |
| *** | MWSC | Michigan Works Service Centers
| |
| ** | MWSC | Minimum Wage Study Commission
| |
| ** | MWSC | Male Water and Sewerage Company
| |
| ** | MWSC | Marblehead Water and Sewer Commission
| |
| ** | MWSC | Migrant Workers Support Centre
| |
| ** | MWSC | Mathware and Soft Computing
| |
| ** | MWSC | Maine Winter Sports Center
| |
| ** | MWSC | Municipal Water and Sewage Companies
| |
| * | MWSC | Mid Wales Shakespeare Centre
| |
| * | MWSC | Missouri Western State College
| |
| * | MWSC | Monroe Woodbury Swim Club
| |