An operating system registry contains multiple “identities.” One of these identities is designated the current identity. An application executing on a multitasking computer system uses information stored in the current identity to configure the application, for example to provide a user-specific...http://www.google.fr/patents/US7346908?utm_source=gb-gplus-shareBrevet US7346908 - Changing user identities without closing applications
Changing user identities without closing applications
