| Acronym | Meaning |
| HS-MR-CCSD | Hilbert Space-multireference-coupled Cluster (with) Single (and) Double (excitations) |
| CCTM | Coupled-channel Transition Matrix (in Atom-surface Scattering) |
| CEPA | Correlated Electron Pair Approxn. |
| ECHIC | Evaporative Compact High-intensity Cooler |
| THGA | Transversely Heated Graphite Atomizer |
| FACCE | Frontal Analysis Continuous Capillary Electrophoresis |
| IES | Internal Eliminated Sequence |
| EBSP | Electron Backscattering Pattern |
| BHRA | British Hydromechanics Research Association |
| ISAS | Japanese Institute Of Space And Astronomical Science |