| Acronym | Meaning |
| RIHRA | Research To Improve Health Risk Assessments Program (US EPA) |
| ERDA | US Energy Research And Development Administration |
| DEMS | Differential Electrochemical Mass Spectrometry |
| IEEE | Institute Of Electrical And Electronics Engineers |
| RDPP | Reverse Differential-pulse Polarography |
| LCGTO | Linear Combination Of Gaussian Type Orbitals |
| NDCT | Natural Draft Cooling Tower |
| EGO | Ellipsoidal Gaussian Orbital |
| HMC | Human Mast Cell |
| DDRP | Direct Delayed Response Program (for Long Term Effects Of Acid Rain) |