| Acronym | Meaning |
| HBJ | Hougen-Bunker-Johns (Hamiltonian For Mol. Calcns.) |
| API | Air Pollution Index |
| ES | Electrospray [used Before MS For Mass Spectrometry] |
| ACL | Average Contaminant Level |
| APHEA2 | Air Pollution And Health: A European Approach 2 |
| ASPT | Av. Score Per Taxon |
| TLM | Thermal Lens Microscopy |
| MPPT | Moeller-Plesset Perturbation Theory |
| NSO | Natural Spin Orbitals |
| HOAT | 1-hydroxy-7-azabenzotriazole (peptide Coupling Agent) |