| Acronym | Meaning |
| BK | Brinkman-Kramers (approxn. In Ion-mol. Collision Quantum Calcn.) |
| SGGA | Symmetric Group Graphical Approach (in CI Calcns.) |
| PUFA | Polyunsaturated Fatty Acid |
| EGD | Evolved Gas Detection |
| MR-RWA | Many Resonance-rotating Wave Approxn. |
| CSWP | Centrifugal Sudden [or Coupled States] Wave Packet Method |
| TREF | Temperature Rising Elution Fractionation |
| QLDA | Quasilocal Density Functional Approxn. |
| ACPTQ | Approx. Coupled Pair (theory Cor. For Connected) Triple And Quadruple Excitations |
| BSF | Below Sea Floor |