| Acronym | Meaning |
| NPA | Natural Population Analysis |
| MC CI | Multiconfigurational Configuration Interaction |
| DELFIA | Dissociation-enhanced Lanthanide Fluoroimmunoassay |
| MC CMO | Multiconfigurational Complex Molecular Orbita |
| OAW | Oxyacetylene Welding |
| HABR | Hybrid Anaerobic Baffled Reactor (for Wastewater Treatment) |
| LTTA | Low Temperature Thermal Aeration Process |
| MRCC | Multireference Coupled Cluster |
| PLC | Phospholipase C |
| AQM | Acenaphthenequinone Monoxime |