| Acronym | Definition |
|---|
| MISA | Media Institute of Southern Africa |
| MISA | Motor Industry Staff Association (South Africa) |
| MISA | Mobile Pci to Isa |
| MISA | Management Information Systems Association |
| MISA | Municipal Information Systems Association |
| MISA | Moscow Institute of Steel and Alloys (Russia) |
| MISA | Media Institute of South Africa |
| MISA | Managing Information for Student Achievement (Canada) |
| MISA | Mortgage Interest Saver Account |
| MISA | Ministry of Insurance and Social Affairs |
| MISA | Management of Integrated SDH and ATM Networks |
| MISA | McDonnell International Scholars Academy (Washington University; St. Louis, Missouri) |
| MISA | Multiple Intelligent Software Agents |
| MISA | Microcomputer Industry Suppliers Association |
| MISA | Military Industrial Supply Agency |
| MISA | Multiple Input Signature Analyzer |
| MISA | McGill Iranian Students Association (Canada) |
| MISA | MAJCOM Information Systems Architecture |
| MISA | Mid Illini Surgical Associates (Peoria, IL) |
| MISA | Mangueras Industriales Sociedad Anónima (Guatemala) |
| MISA | Maintenance of Internal Security Act of 1971 (India) |