It goes without saying that a barcode has to affixed to each package and a barcode should also be affixed to the rack in which the package is stored. In a typical stock control application the stock is broken down into products, the barcodes for which may have originated from the product's manufacturer, or alternatively may have been

set up by warehouse staff. The stock control system will know by rack or racks where each product is stored and what the quantities are.

In a medium to large warehouse the operator is often out of site of the computers which house the stock control system. This is typically overcome by wireless scanners which transmit the data to the stock control system or, more often nowadays, and in our view a better solution, by bluetooth scanners. Bluetooth scanners are usually transmit only devices so the stock control system has to be set up so that it can communicate with the operator.