| ESAR | Electromagnetic Spectrum Allocation Request 
| Others |
| ESAR | Electronic Systems for Automation Robotics
| Others |
| ESAR | Emergency System for Advance Registration
| Others |
| ESAR | Emissions Security Assessment Request
| Others |
| ESAR | Empirically Successful Automated Reasoning
| Others |
| ESAR | Energy Storing And Return
| Others |
| ESAR | Enhanced Synthetic Aperture Radar
| Others |
| ESAR | Entry Summary Accounts and Revenue
| Others |
| ESAR | Environmental Site Assessment Repository
| Others |
| ESAR | Escambia Search And Rescue
| Others |
| ESAR | Evidence Search And Recovery
| Others |
| ESAR | Experimental Synthetic Aperture Radar
| Others |
| ESAR | Expert Symposium on Accident Research
| Others |
| ESAR | Explorer Search and Rescue
| Others |