| Acronym | Meaning |
| IBS | Ion Beam Sputtering |
| QRF | Quadratic Response Function (a Quantum Propagator) |
| ACSTM | Alternating Current Scanning Tunneling Microscopy |
| SAGA | Soviet American Gas And Aerosol Experiment |
| NIEM | Noniterative Integral Equation Method |
| ERCAM | Emission Reduction And Cost Analysis Model |
| SGA | Symmetric Group Approach |
| GRIDS | Geographic Resources Information And Data System |
| SHOA | Second-harmonic Optical Activity |
| CRDS | Cavity Ring-down Spectroscopy |