| Acronym | Definition |
|---|
| EGSA | Établissement de Gestion de Services Aéroportuaires (French: Establishment of Airport Services Management; Algeria) |
| EGSA | Electrical Generating Systems Association (on-site power generators; Boca Raton, FL) |
| EGSA | Educational Guidance Service for Adults (Belfast, Northern Ireland, UK) |
| EGSA | Engineering Graduate Student Association (Cornell University; Ithaca, NY) |
| EGSA | Economics Graduate Student Association (various universities) |
| EGSA | Expertise-Géotechnique-Structure-Arbitrage (French: Geotechnical-Expertise-Structure-Arbitration) |
| EGSA | economic gain spatial analysis |
| EGSA | European GNSS (Global Navigation Satellite System) Supervisory Authority (EU) |