An automatic data collection system for recording transaction data from a point of sale terminal employs a magnetic stripe on the back of the bank copy of the familiar sales slip pack. In response to the receipt of a credit authorization number, the POS terminal is operative to transfer tansaction data...http://www.google.de/patents/US4843220?utm_source=gb-gplus-sharePatent US4843220 - Automatic data capture for multiple form point of sale slip packs
