 
      
      
      "Has a large wire loop, with a coil to allow the expansion of the limb." — Baily, 1898
     
          
      
      
         
      
      
      This is a license tag used to identify cars, which reads "Penna 1911 82365."
     
          
      
      
         
      
      
      Two boys playing a game of running and adding three one-digit numbers.
     
          
      
      
         
      
      
      This illustration depicts the use of a key tag, using an object to aid in the identification of a key.