| Acronym | Meaning |
| CSO | Combined Sewage Overflow(s) |
| TTSS | Type III Secretion System |
| SC-2D | State-correlated Two-dimensional (NMR Spectroscopy) |
| MACT | Maximum Achievable Control Technology |
| SMO | Sample Management Office (US EPA) |
| ACP | Air Carcinogen Policy |
| NCB | National Coal Board |
| SOCI | Spin-orbit Configuration Interaction |
| CSD | Chemical Solution Deposition |
| CC-LRT | Coupled-cluster(-based) Linear Response Theory |