| Abbreviation | Definition |
|---|---|
| MSOG | Muslim Society of Guelph |
| MSOP | Mandolin Society Of Peterborough |
| MSOP | Mosaic Society Of Philadelphia |
| MSOS | Manitoba Society Of Seniors |
| MSOS | Medication Safety Officers Society |
| MSOSH | Malaysian Society for Occupational Safety and Health |
| MSOSH | Malaysian Society for Occupational Safety Health |
| MSOSH | Malaysian Society of Occupational Safety and Health |
| MSPA | Massachusetts Society for Promoting Agriculture |
| MSPA | Member Society of Pension Actuaries |
| MSPE | Massachusetts Society of Professional Engineers |
| MSPE | Missouri Society of Professional Engineers |
| MSPS | Maryland State Perfusion Society |
| MSPS | Michigan Society of Professional Surveyors |
| MSPS | Minnesota Society of Professional Surveyors |
| MSPS | Missouri Society of Professional Surveyors |
| MSRC | Massachusetts Society for Respiratory Care |
| MSRC | Massachusetts Society of Respiratory Care |
| MSRC | Michigan Society For Respiratory Care |
| MSRC | Minnesota Society of Respiratory Care |