ArkInventory

AI's display windows are built from 'virtual bars', you assign categories to bars so that items in that category are displayed on the specific bars you want. There is no limit to the number of bars you can have inside a window but obviously you only have so much screen real estate before it becomes 'too many'.

AI uses several methods to assign a default category to an item such as what professions you have, tooltip scanning, basic type/subtype and PeriodicTable. You then assign those categories to a virtual bar.

You can also over-ride the default category by creating a rule that matches either a single or multiple items.