| Acronym | Meaning |
| ICC | Interstitial Cells Of Cajal |
| BWCC | Brillouin-Wigner Coupled-cluster (theory) |
| VC | Vital Capacity (lung Function) |
| SNARE | Soluble NSF Attachment Protein Receptor |
| CHEMTREC | Chemical Transportation Emergency Center |
| WBC | White Blood Cell |
| SAPT | Symmetry-adapted Perturbation Theory |
| PESO | Potentiometric Evaluation Of Substrate Oxidation |
| FCA | Frozen-core Appproximation |
| TEIL | Two-electron Ionization Ladder (wave Function) |