| Acronym | Meaning |
| MET | Multichannel Eikonal Theory (in Atom Electron-impact Excitation) |
| LTTA | Low Temperature Thermal Aeration Process |
| PCOP | Positron Correlation Polarization (potential) |
| NBS | Nucleotide-binding Site |
| TMAH | Tetramethylammonium Hydroxide |
| ISM | Interstellar Medium |
| CCPP | Calcium Carbonate Precipitation Potential |
| RAPRA | Rubber And Plastics Research Association |
| OHCE | One-and-a-half-centered Expansion (method For Calcns. On Charge Transfer In Ion-atom Scattering) |
| CLC | Capacity Limiting Constituents |