The compatibility chart doesn't contain the older film bodies like the F, F2, or any of the Nikkormats. JRP knows this but doesn't have the time to do the research on the older bodies. I started a list to add these bodies but haven't had time to complete it.
The AI designation is a mechanical designation on the mount used to position the meter lever on the camera body. It replaces the need for the prong that sticks up on the manual focus lenses.