| Acronym | Meaning |
| EDW | Exchange Distorted-wave |
| CMS | Comprehensive Modeling System |
| SIC | Self-interaction Correction (in Exchange-energy Calcns.) |
| SPA | Scintillation-proximity Assay |
| RSKERL | Robert S. Kerr Environmental Research Laboratory |
| IMPATT | Impact Avalanche Transit-time |
| IASH | International Association On The Stability And Handling Of Liquid Fuels |
| CRL | Central Regional Laboratory |
| PROX | Preferential CO Oxidn. |
| GWTR | Ground Water Treatment Rule |