| Acronym | Meaning |
 | EROS | Earth Resources Observation System |
| ORB | #NAME? |
| AEW | Airborne Early Warning - Airborne Electronic Warfare |
| NAI | Named Area Of Interest -Network Access Identifier |
| PDF | Panama[nian] Defense Forces (abolished 1990) - Portable Document Format - Principal Direction Of Fire |
| DES | Deep Ecliptic Survey |
| CONOPS | Concept Of Operations (military) |
| YU | York University -former Yugoslavia (ISO 3166 Digram |
| ASWORG | (U.S.) AntiSubmarine Warfare Operations Research Group |
| NS | Nanosiemens |
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