| Acronym | Meaning |
| GDR | Geophysical Data Record |
| GMD | Geometric Mean Diameter |
| JVNTSC | John Volpe National Transportation Systems Center |
| FREON | DuPont Trade Name |
| ORD | Office Of Research And Development |
| DBER | Division Of Biomedical And Environmental Research |
| PEM | Particle Environment Monitor |
| ALDF | Animal Legal Defense Fund |
| TIME-GCM | Thermosphere-Ionosphere-Mesosphere-Electrodynamic General Circulation Model |
| BCD | Binary-coded Decimal |