| Acronym | Definition |
|---|
| MOSA | Metal Oxide Surge Arrester (electrical engineering) |
| MOSA | Multi-Objective Simulated Annealing (algorithm) |
| MOSA | Ministry of Social Affairs (Lebanon) |
| MOSA | Modular Open Systems Approach (US DoD acquisition) |
| MOSA | Ministry of State Administration (Timor) |
| MOSA | Microsoft Online Service Agreement (contract) |
| MOSA | MOtoSAldatrici (Italy) |
| MOSA | Midwest Organic Services Association, Inc. (Viroqua, WI) |
| MOSA | Monmouth Ocean Soccer Association |
| MOSA | Montgomery, Otsego, Schoharie Solid Waste Management Authority (New York State) |
| MOSA | Managed Operating System Alliance (project) |
| MOSA | Mission Operations Support Area |
| MOSA | Michigan Optometric Student Association |
| MOSA | Monash Orientation Scheme for Aborigines (Monash University, Australia) |
| MOSA | Maine Office of Substance Abuse |
| MOSA | Minimum Operational Safe Altitude |
| MOSA | Mercedes Old Scholars Association |
| MOSA | Men Opposed to Sexual Assault |
| MOSA | Missionaries on Special Assignment (International) |
| MOSA | Mississippi Organization of Associate Degree Nursing Student Association |
| MOSA | Maryland Oral Surgery Associates (Rockville, MD) |
| MOSA | Management and Operational Services Agreement |
| MOSA | Mechanical Obstructive Sleep Apnea |
