| Acronym | Meaning |
| EPM | Electron Probe Microscopy |
| VBR | Variational Basis Representation (in Quantum Calcns.) |
| TCM | Transport Control Measures |
| BIIR | Brominated Isobutene-isoprene Rubber |
| AMAP | Arctic Monitoring And Assessment Program |
| SOHO | Solar And Heliosphere Observatory |
| MCRRPA | Multiconfiguration Relativistic Random Phase Approxn. |
| BWCCSD | Brillouin-Wigner Coupled-cluster (with) Single (and) Double (excitations) |
| APCD | Air Pollution Control Device |
| MALT | Mucosa-associated Lymphoid Tissue |