| Acronym | Meaning |
| PIVCDW | Phase Integral Variational Continuum Distorted Wave |
| HBN | Hexagonal Boron Nitride |
| USDW | Underground Source Drinking Water |
| CASE | Computer Aided Software Engineering |
| UCG | Underground Coal Gasification |
| ESAP | Environmental Self-assessment Program |
| ADAS | Acid Deposition Assessment Staff |
| IPIRDW | Independent-process (and) Isolated-resonance (approxn. Using) Distorted Waves |
| ASASP | Active Scattering Aerosol Spectrometer Probe |
| TTL | Transistor-transistor Logic |