It is believed that a signal receiver and a signal transmitter for wirelessly receiving and transmitting signals, respectively, will eventually become standard equipments of a computer in view of the current trend that the data communications between two computers are brought about by remote data signals, and that more and more computer users are on the buying spree of such a signal receiver and such a signal transmitter, which are hooked up with the computer and its peripheral equipments.
It is rather conceivable that such a practice, as described above, of adding the signal receiver and the signal transmitter for wirelessly receiving and transmitting signals, respectively, to a computer system is not only expensive but also wasteful.