| Acronym | Meaning |
| VU-CCSD/R | Valence Universal-coupled Cluster (with) Single (and) Double (excitations) (r = Radial Components Of The Cluster Amplitudes) |
| ECDL | External-cavity Diode Laser |
| ESE | Extended-surface Electrolysis |
| PCS | Permit Compliance System |
| ETA | Eigenstructure Tracking Analysis |
| PLUARG | Pollution From Land Use Activities Reference Group |
| PCET | Proton-coupled Electron Transfer |
| PMMA | Poly (methyl Methacrylate) |
| VCD | Vibrational Circular Dichroism |
| ACPQ | Approx. Coupled-pair (theory Cor. For Connected) Quadruply (excited Clusters) |