| Abbreviation | Definition |
|---|---|
| MASE | Drutvo na Gradenite Konstruktori na Makedonia |
| MASE | Macedonian Association of Structural Engineers |
| MASEAN | Medical Association of South East Asian Nations |
| MASH | Miami Area Society of Homebrewers |
| MASHAL | Making A Society Healthier And Lively |
| MASI | Missouri Aquarium Society Inc |
| MASLAC | Marine Aquarium Society of Los Angeles County |
| MASM | Marine Aquarium Society of Michigan |
| MASM | Marinelife Aquarium Society of Michigan |
| MASM | Medical Aid Society of Malawi |
| MASO | Middle Atlantic Society of Orthodontists |
| MASS | Model of Architecture Serving Society |
| MASS | Modern Academic Slacker Society |
| MASS | Muscle Athletic Sport Society |
| MasTel | Indonesian Infocom Society |
| MasTel | Masyarakat Telematika Indonesia |
| MATE | ??????? ???????? ??????? ????? ?????????? |
| MATE | 'D,E9J) 'DE:1(J) D#3'*0) 'DD:) 'D%F,DJ2J) |
| MATE | Moroccan Association of Teachers of English |
| MATS | Michigan Athletic Trainers Society |