 Commercial web-to-print applications can include both print on demand (POD) or pre-printed materials that are pulled from inventory.POD documents can have static content or include elements of variable data printing (VDP), a form of POD that is mainly used for personalization of marketing materials with product or customer data that is pulled from a database.VDP is geared toward mass customization, whereas web-to-print focuses only on changes made from order to order.