| POI | Point of Intention |
| 2D POI | Two-Dimensional Point of Intention |
| 3D POI | Three-Dimensional Point of Intention |
| POG | Point of Gaze |
| 2D POG | Two-Dimensional Point of Gaze |
| 3D POG | Three-Dimensional Point of Gaze |
| SOI | Space of interest |
| AOI | Area of Interest |
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