| Acronym | Meaning |
| CDRH | Center For Devices And Radiological Health |
| CCPA | Cluster Coherent Potential Approximation (for Electronic Structure Calcns.) |
| EMAT | Electromagnetic-acoustic Transducers |
| MCHC | Mean Corpuscular Hemoglobin Concentration (occupational Exposure) |
| CH-CI | Core Hole Configuration Interaction |
| NATA | National Air Toxics Assessment |
| AERC | Association Of Ecosystem Research Centers |
| GTP | Group-transfer Polymerization |
| PCMCIA | Personal Computer Memory Card International Association |
| RAGS | Risk Assessment Guidelines For Superfund Sites |