Abstract: A pack of bags is disclosed having folded sides being folded in the back towards the middle portion thereof to form a gap therebetween. The pack of bags maybe enveloped by a sleeve. The pack of bags with or without the sleeve is suspended form a rack by inserting a hooks or hooks of the rack in the opening or openings at the disposable upper portion of the pack. The rack has an extension that abuts the upper middle portion of the back of the pack of bags in the gap formed between the folded sides and biases the back towards the front to facilitate the removal of bags.

Abstract: A radio frequency identification (RFID) system may use passive RFID tags that harvest electrical energy from a received signal and store that harvested electrical energy in a capacitor. The stored electrical energy may then be used to transmit from the RFID tag after the received signal has stopped. To decrease the size of the capacitor that is needed, the RFID tag may transmit only briefly, and then use a subsequent received signal to charge up the capacitor for another brief transmission. In some embodiments, each transmission only represents a single binary bit, but a series of such transmissions may be used to transmit multiple bits. Some embodiments may use a radio frequency of 10's of gigahertz.