A new method for transmitter-receiver design that enhances the desired signal output from the receiver by whitening the total interference and noise input to the receiver and maximizing the output Signal to Interference plus Noise power Ratio is presented. The profile or topography of the semiconductor wafer is determined by locating the high points and low points of the wafer profile. The exchange computer is the gateway to the system and manages various transactions such as providing online product catalogs to users that list the merchants products, as well as displaying to the user the reward points he has available in his reward programs with the issuers. It is adapted to be used in returnable circuit containers for dangerous goods, fitted with dry-break or dripless valves.