| Acronym | Meaning |
| OIP | Optimized Inner Projection (method For Mol. Property Calcns.) |
| BRS | Bibliographic Retrieval System |
| NQI | Nuclear Quadrupole Interaction |
| MOPA | Master Oscillator Power Amplifier |
| FECO | Fringes Of Equal Chromatic Order |
| HLA | Human Leukocyte Antigen |
| ITFM | Intergovernmental Task Force On Monitoring |
| MIDAS | Metal Ion-dependent Adhesion Site |
| SRIXE | Synchrotron Radiation-induced X-ray Emission |
| PSD | Position Sensitive Detector |