| Acronym | Meaning |
| RFCC | Residue Fluid Catalytic Cracking |
| IER | Ion Exchange Resin |
| DZPP | Double-zeta (doubly) Polarized (basis Set) |
| CHELP | CHarges From ELectrostatic Potential |
| NIGET | Neutron-induced Gamma-ray Emission Tomography |
| DMRQA | Discharge Monitoring Report Quality Assurance |
| DNC | Delayed Neutron Counting |
| SEAM | Superfund Exposure Assessment Manual |
| ASBF | Aerated Submerged Biological Filter |
| IA | Impulse Approximation |