| MIAA | Manila International Airport Authority 
| Others |
| MIAA | Maryland Interscholastic Athletic Association
| Others |
| MIAA | Massachusetts Interscholastic Athletic Association
| Others |
| MIAA | Medilink International Air Ambulance
| Others |
| MIAA | Meetings Industry Association of Australia
| Others |
| MIAA | Memphis Interscholastic Athletic Association
| Others |
| MIAA | Mersey Internal Audit Agency
| Others |
| MIAA | Michigan Intercollegiate Athletic Association
| Others |
| MIAA | Mortgage Industry Association of Australia
| Others |
| MIAA | Music and Imagery Association of Australia
| Others |