| Acronym | Meaning |
| RHFR | Restricted Hartree-Fock-Roothaan |
| CEPA | Coupled Electron Pair Approximation |
| TPAD | Temperature-phased Anaerobic Digestion |
| MR-ACPF | Multireference-averaged Coupled Pair Functional |
| VBXPS | Valence Bond X-ray Photoelectron Spectroscopy |
| SCIA | Semiclassical Impulse Approxn. |
| ECS | Electroconvulsive Shock |
| APCD | Air Pollution Control District |
| COV | Coefficient Of Variation |
| AFVC | Absorption Freeze Vapor Compression |