| Acronym | Meaning |
| PMP4 | (spin) Projected Moeller-Plesset Fourth-order (perturbation Theory) |
| ECRR | Energy-corrected Rigid-rotor Approximation |
| PIHMC | Path Integral Hybrid Monte Carlo |
| FO-NACME | First-order Nonadiabatic Coupling Matrix Elements |
| MET | Multichannel Eikonal Theory (in Atom Electron-impact Excitation) |
| COSCAT | Coherent Scatter System |
| PSID | Photon Stimulated Ion Desorption |
| CDA | Charge Density Analysis |
| MPR | Mannose Phosphate Receptor |
| CWM | Chemical Waste Management |