| Acronym | Meaning |
| CCM | Cyclic Cluster Model (in CNDO For Deep Levels In Solids) |
| TDMO | Time-dependent Molecular Orbital |
| OPP | Office Of Pesticide Programs |
| ATMS | Assumption-based Truth Maintenance System |
| PRINS | Primed In Situ DNA Synthesis |
| FDR | Frequency Domain Reflectometry |
| IMC | Intermetallic Matrix Composite |
| EMS | Electron Momentum Spectroscopy |
| NIRS | National Inorganics And Radionuclides Survey |
| CCPA | Cemented Carbide Producers Association |