| Acronym | Meaning |
| ESDN | Electron Stimulated Desorption Of Neutrals |
| NDDO | Neglect Of Diatomic Differential Overlap |
| CCDTL | Coupled-cavity Drift-tube Linac |
| ACRIM | Active Cavity Radiometer Irradiance Monitor |
| OMO | Orthonormal Molecular Orbital |
| SBIG | Subject-based Information Gateway |
| LDV | Light Duty Vehicle |
| CNPPA | Commission On National Parks And Protected Areas |
| QCDL | Quenched Cavity Dye Laser |
| UTI | Urinary Trypsin Inhibitor |