| Acronym | Meaning |
| STS | Surface Tunnelling Spectroscopy |
| IRRI | International Rice Research Institute |
| EBK | Einstein-Brillouin-Keller (quantization Method) |
| CELSS | Controlled Ecological Life Support System |
| ACH | Air Changes Per Hour |
| LCAO LSD | Linear Combination Of Atomic Orbitals-local Spin Density |
| CMF | Clay Minerals File (of Digitized X-ray Diffraction Traces) |
| BID | Background Information Document |
| SAM | Scanning Auger Microscopy |
| WQBEL | Water Quality-based Effluent Limits |