| Acronym | Meaning |
| RHFR | Restricted Hartree-Fock-Roothaan |
| EET | Electronic Energy Transfer |
| FCC | Face Centered Cubic |
| RCF | Refractory Ceramic Fibers |
| TSETG | Two-step Excitation Transient Grating |
| CDHR | Center For Devices And Radiological Health |
| EGR | Exhaust Gas Recirculation |
| JKR | Johnson-Kendall-Roberts Contact Model |
| AA | Atomic Absorption |
| BCS | British Chemical Standard |