| ESAR | Empirically Successful Automated Reasoning | 经验上成功的自动推理 |
| ESAR | Engineers and Scientists for Animal Rights | 动物权利工程师和科学家 |
| ESAR | Extended Subsequent Application Review | 扩展后续应用程序审查 |
| ESAR | Electronically Steerable Array Radar | 电子可操纵阵列雷达 |
| ESAR | Enhanced Synthetic Aperture Radar | 增强型合成孔径雷达 |
| ESAR | Electronic Systems for Automation Robotics | 自动化机器人电子系统 |
| ESAR | Emergency Services Adventure Race | 紧急服务冒险赛 |
| ESAR | Electromagnetic Spectrum Allocation Request | 电磁频谱分配请求 |
| ESAR | Explorer Search and Rescue | 探险家搜救 |
| ESAR | Electronic Satellite Access Request | 电子卫星接入请求 |
| ESAR | Equivalent Still-Air Range | 等效静止空气范围 |
| ESAR | Emissions Security Assessment Request | 排放安全评估请求 |
| ESAR | Environmental Situation Assessment Radar (x-band radar for detecting birds at airfields) | 环境状况评估雷达（用于探测机场鸟类的x波段雷达） |