Patent ID: 7606869

Claim:
A system for exchanging data, comprising at least two memory units, each memory unit being configured both as a wireless transmitter of data and a wireless receiver of data, where an exchange of data directly between at least two of the memory units automatically occurs whenever the two memory units are within a certain distance from each other, where the distance between the units is variable over time, where an exchange of data is controlled by at least one preference defined by a user of one of the memory units and relating to requested data to be received from another one of the memory units, where the data transmitted from one of the memory units to another one of the memory units are provided with supplementary information that relates to the transmitted data and are also provided with meta-data separate from the supplemental information which identify at least one relationship between the data exchanged between the at least two memory units, where the supplementary information includes an index which indicates the number of the memory units with the data from the memory unit that transmitted data in which the data have been received without modification by one of the memory units and where the supplementary information includes an index which indicates in how many of the memory units have modified the data, and the supplemental data is included in the automatic exchange of data between the at least two of the memory units.