| Acronym | Meaning |
| APNEA | Active Passive Neutron Examination And Assay |
| NAPL | Nonaqueous Phase Liquid |
| IPDA | Intensified Photodiode Arrays |
| DZ | Double Zeta (basis Set) |
| HER | Human Estrogen Receptorpar |
| CVT | Canonical Variational Transition-state (theory) |
| NCEH | National Center For Environmental Health |
| BOC-MP | Bond Order Conservation-morse Potential |
| SRIXE | Synchrotron Radiation-induced X-ray Emission |
| SPPA | Self-consistent Polarization Propagator Approximation |