| Acronym | Meaning |
| PERTCI | Perturbational Configuration Interaction |
| RAL | Recommended Allowable Limit |
| USP | United States Pharmacopeia |
| BERM | Biological And Environmental Reference Materials |
| TMA | Transcription-mediated Amplification |
| MOVS | Molecular Orbital Valence State |
| RBSC | Reaction-bonded Silicon Carbide |
| MECA | Multiple Excitation Collisional Activation |
| EFPD | Effective Full Power Day |
| ITS | Internal Transcribed Spacer |