| Acronym | Meaning |
| RNO | Reaction Natural Orbital |
| ARS | Agricultural Research Service (US Dept. Of Agriculture) |
| BICINE | N N Bis 2 Hydroxyethyl Glycine |
| PADRE | Particle Analysis And Data Reduction Program |
| PSID | Photon Stimulated Ion Desorption |
| VU-CCSD/R | Valence Universal-coupled Cluster (with) Single (and) Double (excitations) (r = Radial Components Of The Cluster Amplitudes) |
| SORP | Southern Oxidants Research Program |
| BIFET | Bipolar Field Effect Transistor |
| OA | Office Of The Administrator |
| TCS | Target Current Spectroscopy |