it is said to be in normal occlusion when the teeth are present and occluding in a healthy, stable, and pleasant manner while ideal occlusion or we all know "perfect occlusion" is the relationship...
The main difference is your graphics card which is what displays images on the screen constantly. Although gaming on PC requires that almost every hardware aspect be better than you average PC....
It's means "it is" Its' means "belonging to it". Example:We went to see a Chicago landmark. It's downtown and quite popular. Over a million visitors a year attest to its' popularity.