Abstract: A device communicates with a scanner, such as a barcode scanner in a retail environment, and with a point-of-sale (POS) register. The device can process different types of machine-readable codes, such as scanned UPCs and unique barcodes associated with individual scratcher cards and/or other items. Data captured by the scanner passes through the device before reaching the POS register; such data may be selectively retransmitted (with or without modification) to the POS register and/or to a server or other device, or it may be blocked from reaching the POS register, server, and/or other device, depending on the current mode of operation. For example, the device can selectively relay some information (such as UPC data) to the POS register to process sales transactions, and/or can relay other information (such as unique barcode data) to server(s) to perform inventory tracking functions, while blocking such unique barcode data from reaching the POS register.