| Acronym | Meaning |
| AP | Appearance Potential |
| BWCCSD | Brillouin-Wigner Coupled-cluster (with) Single (and) Double (excitations) |
| BKW | Bobylev-Krook-Wu (method For Solving The Boltzmann Equation For A Mol. System) |
| BDH | British Drug House |
| FCI | Fuel Coolant Interaction |
| GHR | Growth Hormone Receptor |
| SNS | Spallation Neutron Source |
| PPH | Parts Per Hundred |
| NDPD | National Data Processing Division |
| UDRI | University Of Dayton Research Institute |