A method for organizing and controlling rental inventory provides an alphanumeric code for each principal item, and based thereon an alphanumeric code for each accessory item that may be used with the principal item. The liquid advantageously comprises an anti-reflective topcoat. A scan register 25 encompasses the intellectual property core and ERP lead 37 carries a signal indicating the presence of the scan register. The peak-to-average power ratio of an input signal can be reduced using two stages of signal clipping. The equipment pad may be stackable or nestable with a second equipment pad.