| Acronym | Meaning |
| DPSSL | Diode Pumped Solid State Laser |
| PXRD | Powder X-ray Diffraction |
| POA | Peierls-Onsager Approxn. (in Electronic Structure Calcns.) |
| TTSS | Tropospheric Trace Species Sounder |
| HPTP | Human Protein Tyrosine Phosphatase |
| AIM | Adiabatic Invariance Method (in Ion-mol. Reactions) |
| HAN | Heavy Aromatic Naphtha |
| LCDA MO | Linear Combination Of Donor-acceptor Molecular Orbital Theory |
| PTEAM | Particle Total Exposure Assessment Methodology |
| OIB | Ocean Island Basalt |