| Acronym | Meaning |
| DOIT | Federal Advisory Committee To Develop On-site Innovative Technologies |
| IUPAP | International Union Of Pure And Applied Physics |
| WCRP | World Climate Research Programme |
| VU-CCSD/R | Valence Universal-coupled Cluster (with) Single (and) Double (excitations) (r = Radial Components Of The Cluster Amplitudes) |
| HRT | Hydraulic Retention Time |
| ARUPS | Angle-resolved Ultraviolet Photoelectron Spectroscopy |
| NAMS | Neutron Activation Mass Spectrometry |
| CPB | Cardiopulmonary Bypass |
| AFPR | Alliance Of Foam Packaging Recyclers |
| PNN | Probabilistic Neural Network |