Abstract: The present invention relates to a method of enabling concurrently lending at least one digital copyrighted content item from one user's terminal to a certain number of other users' terminals over a data network, according to a number of copyright users' licenses of each of said at least one digital copyrighted content item, said method comprises: (a) indexing at least one digital copyrighted content item provided from at least one user's terminal over a data network, giving rise to an items index; (b) receiving a request to lend a digital copyrighted content item to user's terminal over said data network; (c) conducting a search for the requested digital copyrighted content item by means of said items index; (d) if said requested digital copyrighted content item is found by means of said items index, checking whether it is available for lending to said user's terminal, according to a number of available copyright users' licenses of said requested digital copyrighted content item; (e) if said requested digita