| Abbreviation | Definition |
|---|---|
| EIP | ELINT (ELectronics INTelligence) Improvement Program |
| EIP | ELINT Improvement Program |
| EIP | Enterprise Implementation Plan |
| EIP | Evolutionary Implementation Plan |
| EIPD | Everything In Place Date |
| EIR | Equipment Identity Register |
| EIR | Equipment Improvement Report |
| EIS | Engineering and Installation Squadron |
| EIS | Entry Into Service |
| EIS | Environmental Impact Statement; Executive Information System |
| EIS | Executive Information System |
| EISS | Electronic Integrated Sensor Suite |
| EISS | EUCOM Intelligence Support System |
| EISS | Executive Information Systems Seminar |
| EIT | Enhanced Interrogation Technique |
| EIT | Executable Integrity Testing |
| EIWG | Experimentation Integration Working Group |
| EIWS | Edged Impact Weapon Systems |
| EJ | Expansion Joint |
| EJO | Engineering Job Order |