| Acronym | Meaning |
| PSFT | Progressive Saturation Fourier Transform |
| NLSD | Nonlocal Spin Density (functional Theory) |
| DVM | Discrete Variational Method |
| ISF | Interstitial Fluid |
| QPF | Quantitative Precipitation Forecasts |
| DSCCR | Diffractive Sudden-closed Coupled Rotation (for Mol.-surface Scattering Calcns.) |
| NRM | Nuclear Reference Material |
| BH | Barbanis Hamiltonian |
| PI | Plugging Index |
| IOSA | Infinite Order Suden Approxn. (for Mol. Scattering Calcns.) |