1. A method implemented by a computing device, the method comprising: outputting representations of applications in a root level of a file hierarchy maintained by an operating system of the computing device, the representations selectable to launch execution of respective said applications, each of the representations comprising an application icon or an application tile as opposed to a folder; and responsive to recognition by the operating system of an input configured to cause expansion of one of the representations of respective said applications, expanding a display of the representation of the respective application for inclusion in the root level with one or more other said representations of respective said applications, the expanded display of the representation of respective said application configured to accept one or more inputs for the respective application.