| Acronym | Meaning |
| PTC | Positive Temperature Coefficient [elec. Conducting Material] |
| CARL | Colorado Association Of Research Libraries |
| SPB | Strong-potential Born (approxn. For At. Collision Calcns.) |
| PNO-CE | Pseudonatural Orbital-configuration Expansion |
| SCP-IOS | Semiclassical Perturbation-infinite Order Sudden |
| CHARMM | Chemistry At HARvard Macromolecular Mechanics |
| DQW | Double Quantum Well |
| MCM | Multiconfigurational (variation Of) Moments (for Mo Correlation Diagrams Calcn.) |
| PHE | Potentially Harmful Element |
| ALL | Acute Lymphoblastic Leukemia |