| Acronym | Meaning |
| FIB | Focused Ion Beam |
| EH | Extended Hueckel |
| MPAN | Peroxy Methacrolyl Nitrate |
| CPT | Cluster Perturbation Theory |
| HAPEX | Hydrological And Atmospheric Pilot Experiment |
| DISEP | Difference Integrated Spatial Electron Populations |
| CS | Crystal Structure |
| ACRS | Applied Computational Research Society |
| DSP | Digital Signal Processor |
| EPACML | Environmental Protection Agency's Composite Landfill Model |