| Acronym | Meaning |
| JOSO | Joint Organization For Solar Observations |
| IID | Ion Impact Desorption |
| IHF | Integration Host Factor |
| BIF | Boilers And Industrial Furnaces (USEPA Rule) |
| VEDW IOS | Vibrational Exponential-distorted-wave Infinite-order-sudden (method For Inelastic Mol. Collisions Calcn.) |
| UVP | Ultrasonic Vibration Potential |
| EINP | Energy-independent Nonlocal Pseudopotential |
| IRIS | Integrated Risk Information System |
| NBSB | National Biomonitoring Specimen Bank |
| AQCC | Air Quality Control Center |