| Acronym | Meaning |
| OHER | Office Of Health And Environmental Research (US Dept. Of Energy) |
| APS | Aerodynamic Particle Sizer |
| PAPS | Phase-alternated Pulse Sequence |
| NAPBN | National Air Pollution Background Network |
| HFG | Hartree-Fock-Gopinathan (quantum Theory Or Wave Function) |
| WAS | Whole Air Sampler |
| HH-GLF | Hyperspherical Harmonic-generalized Laguerre Function |
| FACS | Fluorescence Atom-coincidence Spectroscopy |
| WIPO | World Intellectual Property Organization |
| PSCI | Pseudo Configuration Interaction |