| Acronym | Meaning |
| ADI | Alternating Direction Implicit (method) |
| GBCD | Grain Boundary Character Distribution |
| UMP2 | Unrestricted Moeller-Plesset 2nd-order (perturbation Theory) |
| DISI | Direct-injection Spark-ignition |
| CMF | Colloid Metal Film |
| WQCDS | Water Quality Criteria Documents |
| BSO | Basic Symmetric Operator (in Second-quantization Calculations) |
| RIXS | Resonant Inelastic X-ray Scattering |
| SELDI | Surface-enhanced Laser Desorption Ionization Spectrometry |
| BGA | Bundesgesundheitamt (German Health Ministry) |