| MAI | Ford Mainline 
| Others |
| MAI | Machine-Aided Indexing
| Others |
| MAI | Made As Instructed
| Others |
| MAI | Mail message
| Others |
| MAI | Mainly Aids Investors
| Others |
| MAI | Maithili
| Others |
| MAI | Malaysia Automotive Institute
| Others |
| MAI | Man Assisting Innovations
| Others |
| MAI | Marina Abramovic Institute
| Others |
| MAI | Market Activity Index
| Others |
| MAI | Market for Alternative Investments
| Others |
| MAI | Martial Arts Institute
| Others |
| MAI | Maserati Automobiles Inc.
| Others |
| MAI | Mean Annual Increment
| Others |
| MAI | Median Area Income
| Others |
| MAI | Medical Action Industries
| Others |
| MAI | Member Appraisal Institute
| Others |
| MAI | Mexican Automotive Industry
| Others |
| MAI | Microwave Assisted Ignition
| Others |
| MAI | Military Action Incorporated
| Others |
| MAI | Minority AIDS Initiative
| Others |
| MAI | Mission Arthritis India
| Others |
| MAI | Mobile App Install
| Others |
| MAI | Mobile Artificial Intelligence
| Others |
| MAI | Modern American Institute
| Others |
| MAI | Moscow Aviation Institute
| Education, College, University, Institute |
| MAI | Most Annoying Individual
| Others |
| MAI | Motorsports Association of India
| Others |
| MAI | Multilateral Agreement on Investment
| Others |
| MAI | Multiple Access Interference
| Others |
| MAI | Munich, Augsburg, and Ingolstadt
| Others |
| MAI | Muzeul AIud
| Others |
| MAI | Myanmar Airways International
| Others |
| MAI | Mycobacterium Avium Intercellulare
| Others |
| MAI | Mycobacterium avium intracellulare
| Others |
| MAI | Mycobaterium Avium Intercellure
| Others |