| Acronym | Meaning |
| BNFL | British Nuclear Fuels Laboratory |
| SCCT | Semiclassical Complex Trajectory |
| ECM | Embedded Cluster Method (in Electronic-structure Calcns.) |
| FOND | Fiber-optic Neutron Detector |
| TS | Transition State |
| VNTR | Variable No. Of Tandem Repeat |
| SCEMR1 | Soil Chemical Exchange And Migration Of Radionuclides Model |
| FTNMR | Fourier-transform Nuclear Magnetic Resonance |
| F4 | Fourth-order Feenberg (quantum Theory) |
| PIRI | Photoinduced Rydberg Ionization |