| Acronym | Meaning |
| MOPA | Master Oscillator Power Amplifier |
| HPSAM | H-point Standard Additions Method |
| UERPIC | Underground Excavation And Rock Properties Information Center |
| ASIP | Aircraft Structural Integrity Program |
| GRNN | Generalized Regression Neural Network |
| GDR | Geophysical Data Record |
| QSI | Quantum Statistical Interference |
| D-SIC | Degeneracy-dependent Self-interaction Correction |
| SEED | Self Electro-optic Effect Device |
| DIG | Diffuse Ionized Gas |