| Acronym | Meaning |
| FEMP | Free Of Empirical Parameters (e.g. |
| AFDM | Ash Free Dry Mass |
| EOM | Equations Of Motion Method (green's Function) |
| MIBD | Micro-interferometric Backscatter Detection |
| LTDU | Land Treatment Demonstration Unit |
| RASW | Relativistic Augmented Spherical Wave Method |
| BCCD | Brueckner Coupled Cluster With Double Excitations |
| FLCAO | Factorized LCAO |
| IODS | Identical Orbitals For Different Spins |
| CRDL | Contract Required Detection Limit(s) |