| Acronym | Meaning |
| GBF | Gibbs-Bogolyubov-Feynman (variational Principle) |
| TES | Transition-edge Sensor |
| DEMA | Diesel Engine Manufacturers Association |
| AGCI | Aspen Global Change Institute |
| IRF | Interferon Regulatory Factor |
| AOB | Adiabatic Oxygen Bomb (calorimeter) |
| XFA | X-ray Fluorescence Analysis |
| ACPTQ | Approx. Coupled Pair (theory Cor. For Connected) Triple And Quadruple Excitations |
| AAAS | American Academy Of Arts And Sciences |
| HAPPS | Hazardous Air Pollutant Prioritization System |