| Acronym | Definition |
|---|
| SEMA | Specialty Equipment Market Association |
| SEMA | State Emergency Management Agency |
| SEMA | Specialty Equipment Manufacturers Association |
| SEMA | Session Based Mobile Adhoc Network Architecture |
| SEMA | Semaphorin |
| SEMA | Société d'Encouragement aux Métiers d'Art (Society for the Promotion of Art Trades; France) |
| SEMA | Special Electronic Mission Aircraft |
| SEMA | Simple Electromagnetic Analysis (cryptography) |
| SEMA | Storage Equipment Manufacturers Association |
| SEMA | Software Engineering Measurement and Analysis (SEI) |
| SEMA | Sharp Electronics Manufacturing Company of America, Inc. (San Diego, CA) |
| SEMA | Station Engineering Management Aid |
| SEMA | Southeastern Medieval Association |
| SEMA | Senior Employment Medical Adviser (UK) |
| SEMA | Session-based Mobile AdHoc Network Architecture (Yeditepe University) |
| SEMA | Sociedad Erasmiana de Málaga (Spanish: Erasmus Society of Malaga; Malaga, Spain) |
| SEMA | Synergie Entreprise Milieu d'Accueil (Belgium) |
| SEMA | Situation-Execution Monitor Advisor |
| SEMA | Systems Engineering & Management Associates, Incorporated |