Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium to increase product usage. In some examples, a request to assign a task to a selected user is received. The selected user as a non-user of the task service. In response, task information and an identification of the task service is appended to an electronic document. Once the selected user has subscribed to the task service, the selected user is assigned to the task within the task service.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for receiving, by the one or more processors, user input, the user input indicating an assignment of a particular task by a first user to a second user, the first user being a user of a product that provides the particular task; determining, by the one or more processors, that the second user is a non-user of the product and, in response: appending product promotion data to an electronic document, the product promotion data providing a summary of task-based action data that is associated with the second user; and transmitting the electronic document to the second user.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for displaying, by the one or more processors, at least one graphical representation associated with an electronic document on a touchscreen display; and receiving, by the one or more processors, user input to the at least one graphical representation, the user input indicating a touchscreen gesture to the touchscreen display, and in response: determining a type of the touchscreen gesture; determining a degree of the touchscreen gesture; identifying one or more actions based on the type and the degree, each action of the one or more actions being executable to progress through a workflow; and displaying one or more action elements on the touchscreen display, each action element representing an action of the one or more actions.