| Acronym | Definition |
|---|
| MSID | Module Specification Id |
| MSID | Microsoft Identifier |
| MSID | Mobile Station Identifier |
| MSID | Manufacturing Systems Integration Division (NIST) |
| MSID | Minnesota Studies in International Development |
| MSID | Mobile Station Identifier (wireless) |
| MSID | Malaysian Society of Interior Designers |
| MSID | Mass Spectrometer Lead Detector |
| MSID | Mobile Subscriber Identification |
| MSID | Measurement Stimulation Identification |
| MSID | Master School Identification |
| MSID | Master of Science in Industrial Design (various schools) |
| MSID | Medical Staff Identification |
| MSID | Mr. Smith's Incredible Diamond |