| Acronym | Meaning |
| RFE | Recursive Feature Elimination |
| TACB | Texas Air Control Board |
| STM | Space-translation Method (in Atomic Collision Calcn.) |
| BSM | Breathing Shell Model |
| MCS | Media Cleanup Standard |
| CC-CI | Cluster Corrected-configuration Interaction |
| TRMM | Tropical Rainfall Measuring Mission |
| CMBR | Cosmic Microwave Background Radiation |
| RAS | Reflection-absorption Spectroscopy |
| EGBD | Extrinsic Grain Boundary Dislocation |