The document proposes a model for handling intuitive behavior in GUI lists when multiple user actions are combined. It defines a set of deltas (Add, Remove, Change, Filter, Sort, Select) that can be applied to lists and examines scenarios where multiple deltas are combined, such as sorting then selecting items or filtering and then removing an item. The objective is to make lists behave intuitively no matter the order of actions. Future work includes generalizing the model to handle tree structures and considering the visible portion of long lists.