The PLU (Price Look-Up) is a numerical code that enables cashiers and checkout systems to automatically apply the correct price without the need for a barcode.
PLU codes generally consist of 4 or 5 digits:
4 digits (e.g. 4011 for classic yellow banana): conventionally grown product.
5 digits starting with 9 (e.g. 94011): organically grown product. These codes are standardized by IFPS (International Federation for Produce Standards).