A method and system is provided for creating applications for one or more types of programmable logic controllers. In accordance with certain implementations, information is accessed indicating which documents were selected by a user and which documents were not selected by a user. A locking finger of the present invention prevents opening of the barrier. The present invention may be implemented via either a brick-and-mortar casino or an online casino. Additionally, a multiband actuation system may be used where two or more transducers each deliver sounds within certain frequencies.