| Acronym | Meaning |
| UCCSD | (spin) Unrestricted CCSD |
| SCAQMD | South Coast Air Quality Management District |
| IPC | Ischemic Preconditioning |
| HETG | High-energy Transmission Grating |
| PGM | Platinum-group Mineral(s) |
| CRIOSA | Classical Reactive Infinite Order Sudden Approxn. |
| IDSRS | Ionization-detected Stimulated Raman Spectroscopy |
| ICZ | Initial Contact Zone(s) |
| SCA | Self-consistent Approximation |
| CDM | Clean Development Mechanism |