| Acronym | Meaning |
| MESI | Membrane Extn. With A Sorbent Interface |
| RCHF | Relaxed-core Hartree-Fock (approxn. In Calcns. On Mol. K-shell Excitation Spectra) |
| FLAPW | Full-potential Linearized Augmented Plane Wave |
| RHFO | Relativistic Hartree-Fock One-channel (for Scattering) |
| EX-MEG | Excited-mixed Exponentially Generated (wave Function) |
| SRP | Soluble Reactive Phosphorus |
| DIB | Diffuse Interstellar Band |
| VOIE | Valence Orbital Ionization Energy |
| ULFM | Unified Ligand Field Model (for Mol. Electronic Energies) |
| TPP | Triphenyl Phosphate |