| Acronym | Meaning |
| ODCPA | Off-diagonal (disorder) Coherent-potential Approxn. |
| TWA | Time-weighted Average Limit |
| ECSTM | Electrochemical Scanning Tunneling Microscopy |
| ASASP | Active Scattering Aerosol Spectrometer Probe |
| DWBC | Deep Western Boundary Current |
| CP | Coupled Pair (many-electron Theory) |
| MMS | Merged Markush Service |
| MCA | Manufacturing Chemist Association |
| IAD | Ion Assisted Deposition |
| NAWQA | National Water Quality Assessment (US Geological Survey) |