An information terminal unit with history management functions, wherein the user clicks on previous and later history buttons using a mouse. Clicking a history button causes a URL assigned with a version number to be created. The URL is sent to a relay server, which searches its cache for the requested...http://www.google.es/patents/US5991773?utm_source=gb-gplus-sharePatente US5991773 - Information terminal unit with history management functions
Information terminal unit with history management functions
