| Acronym | Meaning |
| THTR | Thorium High Temperature Reactor |
| CTAC | Counterdrug Technology Assessment Center |
| CAI | Calcium Aluminum Inclusion |
| CCN | Cloud Condensation Nucleus |
| MARS | Membrane Anaerobic Reactor System |
| SOF | Soluble Organic Fraction |
| RSK | Ribosomal S6 Kinase |
| HRBS | High Resolution Rutherford Backscattering |
| ITT | Impact Transition Temperature |
| NRMRL | National Risk Management Research Laboratory |