| Acronym | Meaning |
| OUR | Oxygen Uptake Or Utilization Rate |
| QCI | Quadratic Configuration Interaction |
| GMAV | Genus Mean Acute Value |
| USMAR | Upflow Static-Media Anaerobic Reactor |
| LOM | Laminated Object Manufacturing |
| DCA | Dressed-cluster Approximation (in Band-structure Calcns.) |
| TMV | Thermal Modulation Voltammetry |
| NTRM | NIST Traceable Ref. Materials |
| POSCO | Pohang Steel Company |
| SNIF | Site-specific Natural Isotope Fractionation |