Modes are bad. Therefore LeapMode is good. Customization is bad. Therefore allow no customization whatsoever. Icons are bad. Therefore, stick to text. Zooming Interface: ZoomingInterfaceParadigm (ZIP is something to replace applications, desktop, browsers, etc. All of the content is displayed on an infinite virtual plane. As you zoom closer, documents can be edited. Filesystems are bad. Instead, just provide an interface where the user can type text. If not the zooming interface, then perhaps the old CanonCat interface — one huge text with document separation characters. If it is easy to select text and print it — i.e. it is easy to mark the text between two document markers — then files are not useful.