| Acronym | Meaning |
| PDS | Piecewise Direct Standardization |
| BMRB | Bio Mag Res Bank |
| EMSL | Environmental Monitoring Systems Laboratory |
| NIWR | National Institute For Water Research (South Africa) |
| PCR | Principal Component Regression |
| CVSEH | Correlated Valence Shell Effective Hamiltonian |
| INMM | Institute Of Nuclear Materials Management |
| MSAPC | Mobile Source Air Pollution Control |
| ASED | Atom Superposition-electron Delocalization |
| ITRC | Interstate Technology And Regulatory Cooperation Working Group |