| Acronym | Meaning |
| DIRP | DOE Internal Review Panel |
| ECS | EOSDIS Core System |
| PERT | Performance Evaluation And Review Technique |
| ALPTRAC | Part Of EUROTRAC |
| RSA | Range Standardization And Augmentation Project |
| ALPA | Airline Pilots Association |
| DSM | Demonstration Support Model |
| ELLWAS | Enhanced Low-Level Windshear Alert System |
| ELCHEM | Electrified Clouds As Sources Of NOx |
| LRE | Latest Revised Estimate |