| Acronym | Meaning |
| TSW | Torsional Spin Wave (type Of Hartree-Fock Wave Function) |
| CCSDTQ | CCSDT (with) Quadruple (excitations) |
| LLS | Linear-least Squares |
| ACC | Acetyl-CoA Carboxylase |
| PCID | Point-charge-induced-dipole (model |
| AF | Anaerobic Filter |
| IAM | Immobilized Artificial Membrane |
| HRC | Rockwell Hardness (C Scale) |
| BSO | Bismuth Silicon Oxide |
| EFOIA | Electronic Freedom Of Information Act |