| Abbreviation | Definition |
|---|---|
| MSNBC | More Stupid Nazi Broadcasting Company |
| MSNC | Marketing, Sales, & Network Company |
| MSNC | Micro Systems Network Company |
| MSP | Managed Service Provider |
| MSP | Mathematica Server Page |
| MSP | Merchant Service Provider |
| MSP | MLS Service Provider |
| MSP | Moeller Special Processing |
| MSP | Moerdijk Sorting and Packing |
| MSPC | Michael Scott Paper Company |
| MSPCI | Michael Scott Paper Co. Inc. |
| MSPCI | Michaels Stores Procurement Co Inc |
| MSPCL | Manipur State Power Company Limited |
| MSR | Malcolm Smith Racing |
| MSRC | Marine Spill Response Corporation |
| MSS | Main Street Savings |
| MSS | Management and Secretariat Services |
| MSSI | Medical Staffing Solutions Inc |
| MSSI | Millennium Systems Services Inc |
| MSSI | Modular Security Systems Inc |