| Acronym | Meaning |
| AFW | Auxiliary Feedwater |
| NSPI | National Society For Programmed Instruction |
| S/N | Signal-to-noise Ratio |
| CASP | Canadian Atlantic Storms Project (or Program) |
| SESS | Space Environment Support System |
| OCTA | Oxidizing Capacity Of The Troposphere Atmosphere |
| BWI | Baltimore-Washington International Airport |
| MM | Milli Mole |
| USFS | United States Forest Service |
| ISUSS | Integrated Surface And Upper-air Sounding System |