Computer based method and apparatus for evaluating a graphic image file for the presence of objectionable visual content. The datum plate has a set of predetermined attachment locations adapted to couple the datum plate to a chamber; a set of predetermined attachment locations adapted to couple one or more automatic door opener platforms to the datum plate; and a set of predetermined attachment locations adapted to couple one or more substrate handlers contained within the chamber, to the datum plate. A controller can be included for selectively adjusting an angular spacing and eliminating rays in successive launches to focus an energy on the receiver. The clamp tightens the terminal units using the wedge-shaped recesses and enables a vertical connection and a lateral connection. Data to be written to a memory chip is sent as part of the addresscommand word, or is transferred on an outgoing data bus chain.