| Acronym | Meaning |
| NPR | Net Protein Retention |
| EAROM | Electrically Alterable Read Only Memory |
| GHRS | Goddard High Resolution Spectrograph |
| PEF | Peak Expiratory Flow |
| CEM | Conventional Electron Microscope |
| PUHFS | Projected Unrestricted-Hartree-Fock-Slater |
| MP2 | Moeller-Plesset Second-order Perturbation Theory |
| RET | Resonance Energy Transfer |
| FDPM | Frequency-domain Photon Migration |
| ENR | Endogenous Nitrate Respiration |