| Acronym | Meaning |
| RC(XI) | (fully) Correlated Relativistic Local-density |
| SAGE II | Stratospheric Aerosol And Gas Expt. II |
| HVLP | High-volume Low Pressure [spray Gun] |
| SERS | Surface Enhanced Raman Spectroscopy |
| MIDI-N | Split-type Contracted GTO Basis Set (n = 1 |
| BMAW | Bare Metal Arc Welding |
| GSMT | Giant Segmented Mirror Telescope |
| LPUMP | L-fold (spin) Projected Unrestricted Moeller-Plesset |
| EGM | Electron Gas Model |
| SPI | Society For The Plastics Industry |