| ETSA | European Telecommunication Services Association | 欧洲电信服务协会 |
| ETSA | European Television Services Association | 欧洲电视服务协会 |
| ETSA | Extended Topology Synthesis Algorithm | 扩展拓扑综合算法 |
| ETSA | Electricity Trust of South Australia | 南澳大利亚电力信托 |
| ETSA | Seaman Apprentice, Electronics Technician Striker (Naval Rating) | 海员学徒、电子技师罢工（海军等级） |