| Acronym | Meaning |
| MSO | Molecular Spin Orbital |
| PMP4 | (spin) Projected Moeller-Plesset Fourth-order (perturbation Theory) |
| RSW | Resistance Spot Welding |
| IMD | Intermetal Dielectric |
| ELCD | Electrolytic Conductivity Detection |
| PES | Photoelectron Spectroscopy |
| RXTE | Rossi X-ray Timing Explorer |
| SAR | Simulated Acidic Rain |
| OSIRIS | Oxford Supersensitive Injector For Radioactive Isotope Separation |
| VCAM-1 | Vascular Cell Adhesion Mol. 1 |