1. A method in a system of mobile and fixed computer controlled devices and mobile users for performing a multiplicity of operations, each computer controlled device and user being identifiable and locatable by the system, and having at least one allowable operation, the method establishing ownership control of at least a portion of a particular device by an identified user based on the context of the system and the environment of the particular device, the method comprising the steps of: requesting a level of ownership control of said particular device; identifying device properties of said particular device, the device properties including ownership policies; determining a present state of said particular device, including an ownership state; determining context of said particular device, including users and devices in proximity to said particular device; based on said requested level of ownership control, said present state of said particular device, and said context of said particular device, determining an ownership access of said particular device to be granted to said identified user consistent with the ownership policies of the particular device; and granting said ownership access to said identified user.