On Data Tagging
Pick up most items, from the soup can, to the library book, and you will find a data tag. In most cases, that tag is the simple, ubiquitous bar code that seems to have been around forever. They are the lineal representation of numbers in a machine readable format that most people do not even pay attention to any more (although some of us are old enough to remember a time before they were so common place). More recently, the shippers UPS and FedEx have moved to more complex data tags to help expedite the automated sorting and shipping of the thousands of products that they handle every day.
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