| Acronym | Meaning |
| MSI | Microsatellite Instability |
| OFDR | Off-frequency Decoupling Resonance |
| HTD | Hancock-Truhlar-Dykstra (potential Energy Surface) |
| PSCA | Periodic Small-cluster Approach (a Many-body Technique In Electronic-structure Calcns.) |
| CISC | Configuration Interaction (with) Size-consistency (correction) |
| ALS | Amyotrophic Lateral Sclerosis |
| DLOS | Deep-level Optical Spectroscopy |
| XMM | X-ray Multi-Mirror |
| ETF | Exponential-type Function (an Ao) |
| ISEELS | Inner-shell Electron Energy Loss Spectroscopy |