| Acronym | Meaning |
| ICAC | Institute Of Clean Air Companies |
| DGNAA | Delayed Gamma-ray Neutron Activation Analysis |
| MRCC | Multireference Coupled Cluster |
| USDW | Underground Source Drinking Water |
| SMART-1 | Small Missions For Advanced Research In Technology-1 |
| SMBC | Soil Microbial Biomass Carbon |
| IRRI | International Rice Research Institute |
| ISLOCA | Inter-system Loss-of-coolant Accident |
| AASHO | American Association Of State Highway Officials |
| ASI | Advanced Study Institute (NATO) |