| Acronym | Meaning |
| GWKB | Generalized Wentzel-Kramers-Brillouin |
| NIRS | Neutral Impact Radiation Spectroscopy |
| ICR | Intelligent Optical Character Recognition |
| SMOGSTOP | Statistical Model Of Ground-level Short Term Ozone Pollution |
| RAM | Reference-system Average Mayer-function (in Perturbation Theory) |
| NRA | National Rivers Authority (UK) |
| EPCE | Effective Pair Correlation Energy Method |
| EOM | Equations Of Motion Method (green's Function) |
| MEDOC | Multipole Expansion Defined (on) One Center (a Wave Function In Calcns. On Atomic And Molecular Collisions) |
| IRFPA | IR Focal Plane Array |