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In most MMOs: A very common feature that regroups, in your inventory, items that are similar, and stacks the items that are identical. All the radiant enchants of the same level in the same slot, the radiant enchants of different levels in neighbour slots, etc etc.
In NW: A feature that randomly misplaces all the items of your bag, ungrouping items, creating holes, preventing you from finding anything in your bags, unless you're ready for lengthy researches.