| Acronym | Meaning |
| BTEM | Band Target Entropy Minimization |
| MP2 | Moeller-Plesset Second-order Perturbation Theory |
| KCS | K-matrix Centrifugal Sudden (in Mol.-scattering Theory) |
| WSHS | Watershed Hydrologic System |
| GPT | Glutamic Pyruvic Transaminase |
| NNLS | Non-negative Least-squares |
| PFT | Pulmonary Functional Test(s) |
| AACI | Association Of American Cancer Institutes |
| AIUPS | Angle-integrated Ultraviolet Photoelectron Spectroscopy |
| RE | Relativistic Eikonal |