| MSIS | Main Street Internet Service 
| Others |
| MSIS | Man-Systems Integration Standards
| Others |
| MSIS | Management Science and Information Systems
| Others |
| MSIS | Maple Syrup Injected Sausage
| Others |
| MSIS | Marine Safety Information System
| Others |
| MSIS | Maryland Safety Inspection System
| Others |
| MSIS | Mass Spectrometer and Incoherent Scatter
| Others |
| MSIS | Master of Science in Information Science
| Others |
| MSIS | Master of Science in Information Sciences
| Others |
| MSIS | Master of Science in Information Security
| Others |
| MSIS | Master of Science in Information Systems
| Others |
| MSIS | Master of Science in Interdisciplinary Studies
| Others |
| MSIS | Master of Science Information Systems
| Others |
| MSIS | Master S in Information Systems
| Others |
| MSIS | Masters of Science in Information Systems
| Others |
| MSIS | McKinsey Students In Society
| Others |
| MSIS | Medicaid and Statistical Information System
| Others |
| MSIS | Medicaid Statistical Information System
| Others |
| MSIS | Medical School Information Services
| Others |
| MSIS | Medical School Information System
| Others |
| MSIS | Medical School Information Systems
| Others |
| MSIS | Medical Student Interactive Site
| Others |
| MSIS | Milwaukee Spanish Immersion School
| Others |
| MSIS | Mississippi Student Information System
| Others |
| MSIS | Mobile Station International Subscriber
| Others |
| MSIS | Mobility Support Intermediate System
| Others |
| MSIS | Modeling and Simulation Information System
| Others |
| MSIS | Morris Sallick Industrial Supplies, Inc.
| Others |
| MSIS | Mountain State Information Systems
| Others |
| MSIS | MS Student Information System
| Others |
| MSIS | MSHA Standardized Information System
| Others |