| Acronym | Meaning |
| NDP | Net Driving Pressure (in Membrane Reverse Osmosis) |
| MSA | Methanesulfonic Acid (air Pollutant) |
| APRR | Adiabatic Passage Rotational-resonance |
| CAWG | Clean Air Working Group |
| MS-RHFR | Momentum-space Restricted Hartree-Fock-Roothaan |
| SPICE | Simulation Program With Integral Circuit Emphasis |
| IAP | Islet-activating Protein |
| DWX | Distorted-wave Approxn. With Exchange |
| SOCI | Standard Optimum Control [structure With] Integral [action] |
| EPEBS | Enhanced Proton Elastic Backscattering |