| Acronym | Meaning |
| ND | Nitrification Denitrification |
| CAMM | Cumulative Atomic Multipole Moment (for Mol. Charge Distributions) |
| CATC | Cyanide Amenable To Chlorination |
| HMAC | Hazardous Materials Advisory Council |
| NHGRI | National Human Genome Research Institute |
| WHSV | Wt. Hourly Space Velocity |
| CGC | Constrained Geometry Catalyst |
| HREE | Heavy Rare Earth Element(s) |
| TC-GME | Time-convolution Generalize Master Equation (in Quantum Tunneling Calcns.) |
| AAL | Acceptable Ambient Level(s) |