| Acronym | Meaning |
| LEF | Large-amplitude Elec. Field Fluctuations |
| MPI | Mass Psychogenic Illness (in Indoor Air Pollution) |
| ARMAX | Autoregressive Moving Average Exogenous |
| ABLE | Arctic Boundary Layer Expedition |
| MODR | Microwave Optical Double Resonance |
| FPLMTO | Full-potential Linearized Muffin-tin Orbital |
| CFSTR | Continuous Flow Stirred Tank Reactor |
| ERFEN | Estudio Regional Del Fenomeno El Nino |
| LAWG | Laboratory Accreditation Working Group |
| ATD | Alzheimer Type Dementia |