| Acronym | Meaning |
| PSEM | Point Source Exposure Model |
| CHIRP | Core-hole Initiated Relaxation Process (in Ionic Crystals) |
| MPLS | Modified Partial Least Squares |
| NEE | Net Ecosystem Exchange |
| MLCPA | Maximum Likelihood Principal Component Analysis |
| ABLE | Arctic Boundary Layer Expedition |
| ERP | Effective Refractory Period |
| APRF | Army Pulse Radiation Facility |
| ACE | Aerosol Characterization Experiment |
| CRC | Coupled-reaction-channels (quantum Calcn. Method) |