| Acronym | Meaning |
| MMD | Mass Median Diameter |
| IEF | Inventory Exchange Format |
| BSI | British Standards Institute |
| EPL | Electron Prototype Lab |
| ISOC | Integrated Science Operations Center |
| CARSS | Center For Atmospheric And Remote Sounding Studies |
| MSFE | Mechanisms Of Soil Formation And Evolution |
| VSWR | Voltage Standing-wave Ratio |
| ETR | Element Test Review |
| ASTM | American Society For Testing Materials |