A pull-on disposable wearing article has front and rear waist regions and a crotch region extending between the waist regions. An acoustic signal of each laser beam pulse during a period of time during a duration of each corresponding one of the plasmas is monitored and an acoustic energy parameter value for each of the acoustic signals for each of the corresponding laser pulses is calculated. The system processes the image and bar code symbol by comparing the properties corresponding to the image, the bar code symbol, and properties corresponding to the bar code scanner sensitivity values associated with the bar code scanner device. In yet another application the module may be deployed as a storage or shelving unit. The systems are modular so that various constructs and configurations can be created and customized to a patient.