| Acronym | Meaning |
| FRC | Free Residual Chlorine |
| NTSB | National Transportation Safety Board |
| TOPO | Trioctylphosphine Oxide |
| HMDE | Hanging Mercury Drop Electrode (in Electrochemistry) |
| EPDM | Ethylene-propylene Diene Monomer |
| ERCIM | European Research Consortium For Informatics And Mathematics |
| HED | Howardite-eucrite-diogenite (suite Of Achondrite Meteorites) |
| NRD | Natural Resource Damage |
| NADA | New Animal Drug Application |
| DFS | Daily Flow System (file Within STORET) |