| Acronym | Meaning |
| OSCCM | Open-shell Coupled-cluster Method (in Electronic Property Calcn.) |
| QSPR | Quantitative Structure Property Relationship |
| PRE | Pitting Resistance Equivalent |
| LIMS | Laser Ionization Mass Spectrometry |
| RDF | Restricted Dirac-Fock (quantum Calcn. Method) |
| PPC | Polypropylene Carbonate |
| FOSFA | Federation Of Oils |
| DCS | Distributed Control System |
| BPR | Biological Phosphorus Removal |
| LAI | Leaf Area Index |