Patent ID: 8433754

Claim:
A portable terminal device operable to exchange a list of content data items wirelessly with plural other portable terminal devices, said portable terminal device comprising: a communication unit configured to communicate via at least one wireless network with said plural other portable terminal devices, wherein said at least one wireless network does not include a dedicated server; and a control unit configured to: exchange, via the at least one wireless network, a list of content data items with each one of said plural other portable terminal devices, the exchange of a list of content data items with each said one other portable terminal device occurring when said one other portable terminal device is accessible via the at least one wireless network to said portable terminal device, said exchanging comprising said portable terminal device transferring a list identifying content data items indicated as being recommended by a user of the portable terminal device to said one other portable terminal device and receiving from said one other portable terminal device a list identifying content data items indicated as being recommended by a user of said one other portable terminal device; generate a listing of individual recommended content data items included in lists received from said plural other portable terminal devices; and increment a counter, for each individual recommended content data item included in the listing, indicating a number of lists received from said plural other portable terminal devices in which said individual recommended content data item was included.