| Acronym | Meaning |
| LBF | Local Basis Function Method (for Solid State Band Structure) |
| GRWA | Generalized Rotating-wave Approxn. (in Energy Level Calcns.) |
| LITGS | Laser Induced Thermal Grating Spectroscopy |
| MLPCA | Maximum Likelihood Principal Component Analysis |
| EIP | Electric Induced Polarization (for Subsurface Characterization) |
| EKMA | Empirical Kinetic Modeling Approach (in Air Pollution) |
| ECCS | Emergency Core Cooling System |
| MBSCI | Minimum Basis Set Configuration Interaction |
| DIN | Deutsche Industrie-Norm (German Industrial Standard) |
| APS | American Physical Society |