| Acronym | Meaning |
| PDVSA | Petroleos De Venezuela |
| APT | Atomic Polar Tensor (in Ir Spectra Calcn.) |
| AMO | Alternant Molecular Orbital |
| DSH | Dye-sensitized Heterojunction |
| JAPIO | Japan Patent Information Organization |
| TPW | Transformed Plane Wave Method |
| SANDER | Simulated Annealing With NMR-derived Energy Restraints |
| REA | Relaxed Eddy Accumulation |
| ANP | Atrial Natriuretic Peptide |
| RQCAR | Reportable Quantities For Carcinogens In Hazardous Waste |