| Acronym | Meaning |
| RBAO | Reaction-bonded Aluminum Oxide |
| AHR | Airway Hyperresponsiveness |
| ASSIST | Abstract Semi-Markov Specification Interface To The SURE Tool [propulsion] |
| THEL | Tactical High Energy Laser |
| ATR-FTIR | Attenuated Total Reflection-Fourier-transform IR Spectroscopy |
| GNACHO | Gravitationally Neg. Anomalous Compact Halo Object |
| CGR | Crack Growth Rate |
| PIXET | Proton Induced X-ray Emission Tomography |
| UKIRT | United Kingdom Infrared Telescope |
| NERVA | Nuclear Engine For Rocket Vehicle Application |