| Acronym | Meaning |
| PWM | Pulse Width Modulation |
| BRM | Band Random Matrix (model For Quantum Localization In Conservative Systems) |
| CRISM | Compact Reconnaissance Imaging Spectrometer For Mars |
| AOML | Atlantic Oceanographic And Meteorological Laboratory (of NOAA |
| NLTE | Non-local Thermodynamic Equilibrium |
| MLD | Median Lethal Dose |
| MODULUS | Methods Of Determining And Understanding Light Elements From Unequivocal Stable Isotope Compositions |
| LMXB | Low-mass X-ray Binaries |
| BLTM | Branched Lagrangian Transport [model] |
| PERTCI | Perturbational Configuration Interaction |