| Acronym | Meaning |
| OMS | Octahedral Molecular Sieve |
| VDRE | Vitamin D-responsive Element |
| NSF | Near-surface Fractionated (mantle) |
| DIERS | Design Institute For Emergency Relief Systems (AIChE) |
| EO | Ethylene Oxide |
| ATTIC | Alternative Treatment Technology Information Center (US EPA) |
| TBU | Tertiary Building Unit |
| ARB | Air Resources Board (California) |
| CRU | Constitutional Repeating Unit |
| UBD | Under-bath Decarburization |