| Acronym | Meaning |
| PRDA | Program Research And Development Announcement |
| HER2 | Human Epidermal Growth Factor Receptor 2 |
| POCI | Parent Orbital Configuration Interaction |
| CCCLC | Complex-coordinate Coupled-Landau-channel (method In Calcns. On Autoionizing Resonances) |
| SRT | Sludge Or Solids Retention Time |
| LRR | Leucine-rich Repeat |
| NLC | Nematic Liq. Crystal |
| EBEBO | Extended Bond Energy Bond Order (quantum Calcn. Method) |
| RRM | Rayleigh-Ritz Method (for Quantum Calculations) |
| FDA | Food And Drug Administration |