1. A computing system comprising: 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; wherein 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.