| Acronym | Meaning |
| CCDPPA | Coupled-cluster With Double Excitation Polarization Propagator |
| HPRT | Hypoxanthine Phosphoribosyltransferase |
| DXRL | Deep X-ray Lithography |
| BAHC | Biospheric Aspects Of The Hydrological Cycle |
| ASPG | Antisymmetrized Product Of Separated Geminals Approxn. |
| MDS | Matrix-diagonalization Sudden Approximation (for Atom Surface Scattering Calcns.) |
| SPA | Separated Pair Approxn. (wave Function) |
| ETBM | Empirical Tight-binding Method (in Electronic Structure Calcn.) |
| PBC | Periodic Bond Chain |
| WAXD | Wide-angle X-ray Diffraction |