| Acronym | Meaning |
| EDXR | Energy Dispersive X-ray Reflectometry |
| IIXS | Ion Induced X-ray Spectroscopy |
| IMBPT | Interaction Many-body Perturbation Theory |
| EDQNM | Eddy-damped Quasinormal Markovian [mathematics In Engineering] |
| OPAL | Optical Pumping Absorption Lidar |
| VHAP | Volatile Hazardous Air Pollutant |
| EX-MEG | Excited-mixed Exponentially Generated (wave Function) |
| RELAX | Refrigerator Enhanced Laser Analyzer For Xenon |
| WEFT | Water Elimination By Fourier Transform |
| NDLM | Nondiagonal Lagrange Multiplier |