| Acronym | Meaning |
| EDHF | Endothelium-derived Hyperpolarizing Factor |
| MPQC | Massively Parallel Quantum Chemistry |
| EBEBO | Extended Bond Energy Bond Order (quantum Calcn. Method) |
| LLDPE | Linear Low Density Polyethylene |
| RAF | Reactivity Adjustment Factor |
| PMMA | Poly (methyl Methacrylate) |
| ABBOT | Atomic Billiard Ball Orbital Theory |
| ERIN | Environmental Resources Information Network |
| CHARMM | Chemistry At HARvard Macromolecular Mechanics |
| BHSIP | Bottom-hole Shut-in Pressure |