A computing system comprises, in one example, a display system configured to generate user interface displays, a first application configured to define an entity in the computing system, an interface component configured to control a second application to generate a notebook component corresponding to the entity, and an association component configured to generate and store an association between the entity and the notebook component. The first application is configured to control the display system to generate a first application user interface display that displays data for the entity in the first application and includes a user input mechanism corresponding to the notebook component in the second application based on the association.