| Acronym | Meaning |
| LDA | Linear Discriminant Analysis |
| TPN | Total Parenteral Nutrition |
| HWERL | Hazardous Waste Engineering Research Laboratory (USEPA Cincinnati) |
| HHH | Henon-Heiles Hamiltonian |
| RDF | Restricted Dirac-Fock (quantum Calcn. Method) |
| MCLG | Maximum Contaminant Level Goal |
| NDSC | Network For The Detection Of Stratospheric Change |
| ACRE | Automatic Climatological Recording Equipment |
| DMRG | Density Matrix Renormalization Group (quantum Calcn. Method) |
| BRS | Bibliographic Retrieval System |