| Acronym | Meaning |
| PNA | Polynuclear Aromatic Compound(s) |
| CBS | Cystathionine Beta-synthase |
| PSZ | Partially-stabilized Zirconia |
| IASAP | International Arctic Seas Assessment Project |
| LCGTO-MCP-LS | Linear Combination Of Gaussian-type Orbitals-model Core Potential-local Spin Density |
| FEMP | Federal Energy Management Program |
| NHFPT | Nonorthogonal Hartree-Fock Perturbation Theory |
| CPMCHF | Coupled Perturbed Multiconfiguration Hartree-Fock |
| IPF | Inorg. Polymer Flocculant |
| JESS | Joint Expert Speciation System |