A gun sling for carrying a rifle or shotgun is adjustable to serve either as a bungee sling or a fixed-length, non-stretch sling. A second set of a classifiers are also trained to predict the categories using the attributes of the cases. Additionally, the processor is configured to generate a computer-readable code that encodes at least the identifier, print the computer-readable code to a physical medium, and insert the physical medium into a food item, thereby transforming the food item into an information carrier.