| Acronym | Meaning |
| GOPW | Gaussian Orthogonalized Plane Wave |
| KPNO | Kitt Peak National Observatory |
| GCLSDA | Gradient-corrected Local Spin Density Approximation |
| IMS | Ion Mobility Spectrometry |
| HDD | Hard Disk Drive |
| RLPPS | Reactive Low-pressure Plasma Spraying |
| AMOS | Automated Meteorological Observing System |
| DBI | Diazepam Binding Inhibitor |
| SAIC | Science Applications International Corporation |
| ECI | Size-extensive CI |