| Escondido Amateur Radio Society | Academic & Science |
| Effective Affordable Reusable Speech | Academic & Science |
| Electrostatic Atmospherics Radio Sensor | Academic & Science |
| EUMESTAT Advanced Retransmission Service | Academic & Science |
| Edmond Amateur Radio Society | Academic & Science |
| East Anglian Rocketry Society | Academic & Science |
| Electronic Arts Redwood Shores | Academic & Science |
| Emirates Amateur Radio Society | Academic & Science |
| Electronic Academic Records System | Academic & Science |
| Eastman Audio Research Studio | Academic & Science |
| Evaluate Analyze Resolve Strategically | Business |
| Elicit, Amplify, Reinforce, And Start | Business |
| Endangered Animal Rescue Sanctuary | Community |
| Emergency Animal Rescue Service | Community |
| Entity and Association Retrieval System | Community |
| Education and Administrative Reporting System | Community |
| Education and Administration Reporting System | Community |
| Educational and Academic Retail Shops | Community |
| Education and Animal Rescue Society | General |
| Enhancing Access to the Radio Spectrum | General |
| Animal Rescue Sanctuary | General |
| Expeditionary Air Refueling Squadron | General |
| Emergency Alert Radio System | General |
| Emergency Animal Response Service | General |
| Early Alert Referral System | General |
| Explore Analyze Review Search | General |
| Enhanced Accident Response System | General |
| Early Accelerated Reporting System | General |
| European Automotive Radar Systems | General |
| Electrical Active Roll Stabilization | General |
| Emergency Alert Response System | General |
| Encentus Audio Response System | General |
| Expression Accuracy Rate Smoothness | General |
| En-route Analysis and Reporting System | Governmental |
| Electronic Attitude Response System | Governmental |
| E-mail Address Relay Service | Internet |
| Early Aberration Reporting System | Medical |
| Ephrata Area Rehab Services | Medical |
| Europe Asia roundtable sessions | Regional |
| Effortless Assessment of Risk States | Regional |
| European Antimicrobial Resistance Surveillance | Regional |
