| c | The context tree pruning constant |
| CBPI | Context-based predictive information |
| CT | Context tree |
| DIB | Deterministic information bottleneck |
| I/O CT | Input/output context tree |
| IB | Information bottleneck |
| MI | Mutual information |
| PI | Predictive information |
| Optimal context set | |
| SPI | Sparse predictive information |