| Acronym | Meaning |
| FSGF | FREEON Symmetric Group Formulation (of Hartree-Fock Theory) |
| DRIE | Deep Reactive Ion Etching |
| NRA | National Rivers Authority (UK) |
| AISI | American Iron And Steel Institute |
| QCD | Quantum Chromodynamics |
| UCS | Unconfined Compressive Strength |
| MPD | Multiphoton Dissociation |
| BCC | Basal Cell Carcinoma |
| GVFF | Generalized Valence Force Field |
| CISDT | CI With Single And Double And Triple Excitations |