Like many things in our modern world fruit and produce is shipped from the far corners of the Earth to get to your home and your table. To aid in this shipping and handling, fruit growers and grocery stores have devised a method of numbering fruit and giving beleaguered cashiers a simple way to tell the difference between a small organic Braeburn apple and a large conventionally grown Pink Lady apple without going crazy. These numbers are called PLUs, or Produce Look Ups, and can be either four or five digits long. They typically start with either a 3, 4, 8, or 9. PLUs beginning with a 3 or 4 are typically four digits, while ones starting with 8 or 9 are usually five digits.
On this page you'll find a list of PLU codes that could be used in puzzle building.