| Acronym | Meaning |
| INDO/RZ | Intermediate Neglect Of Differential Overlap/Ridley-Zerner |
| PBMC | Peripheral Blood Mononuclear Cells |
| IMWIR | Interim Mixed Waste Inventory Report |
| PIRI | Photoinduced Rydberg Ionization |
| OSIRIS | Oxford Supersensitive Injector For Radioactive Isotope Separation |
| AFC | Automatic Frequency Control |
| CCFOM | Charche-charge Flux-overlap Modified (model In IR Spectra Calcn.) |
| EDS | Energy-dispersive Spectrometry |
| IMEP | International Measurement Evaluation Program |
| BS | Breathing Sphere (approxn. In Mol.-scattering Calcns.) |