| Acronym | Meaning |
| HFCVD | Hot Filament Chemical Vapor Deposition |
| SAIS | Science And Applications Information System |
| PMP2 | (spin) Projected Moeller-Plesset Second-order (perturbation Theory) |
| APWR | Advanced Pressurized Water Reactor |
| FAD | Failure Assessment Diagram |
| APD | Air Particulate Detector |
| VPN | Virtual Private Network |
| PIO | Paired Interaction Orbital |
| ODEX | Optical Dynamics Experiments |
| SGO | Spherical Gaussian Orbital |