| Acronym | Meaning |
| BBO | Beta-barium Borate |
| PVB | Projected Valence Bond |
| ECNICI | Electron Capture Negative Ion Chemical Ionization |
| HAEC | Human Artificial Episomal Chromosome |
| OES | Occupational Exposure Standard |
| CCC | Copyright Clearance Center |
| PSRA | Pulse Surface Reaction Rate Analysis |
| KKRASA | Korringa-Kohn-Rostoker Atomic-sphere Approxn. (in Band Structure) |
| PAL | Positron Annihilation Lifetime |
| XC | Exchange-coulomb Potential |