| Acronym | Meaning |
| REL | Recommended Exposure Limit(s) |
| ISM | Interaction Site Model (in Statistical Mechanics Of Fluids) |
| VLHC | Very Large Hadron Collider |
| DRS | Dielectric Relaxation Spectroscopy |
| ERE | Estrogen-responsive Element |
| HFJ | Hartree-Fock-Jucys (in Electron-correlation Corrections Calcn.) |
| NSIDC | National Snow And Ice Data Center (University Of Colorado) |
| TPPI | Time Proportional Phase Increment |
| BCNTF | Biofilm-Controlled Nitrifying Trickling Filter (for Wastewater Treatment) |
| TEDE | Total Effective Dose Equivalent |