| Acronym | Meaning |
| CNDO/2-FA | Complete Neglect Of Differential Overlap First Approxn. |
| FAAO | Free-atom Atomic Orbital |
| SPE | Solid Phase Epitaxy |
| TSFZ | Traveling Solvent Floating Zone |
| MR-MBPT | Multireference-many-body Perturbation Theory |
| MAS | Magic Angle Spinning (solid State NMR) |
| CCCO | Committee On Climatic Changes And The Ocean (of IOC And SCOR) |
| EMMI | Environmental Monitoring Methods Index |
| LLNL | Lawrence Livermore National Laboratory |
| QEEC | Quasimol. Extended Elementary Cell (for Electronic Structure Calcns. Of Crystals) |