A backlight unit is disposed beneath a display panel. The inorganic structures may have features on the nanoscale, and the structures generally do not have the repeat protein polymer incorporated therein. The ions in the ionic fluid are attracted towards the charged electrodes and thus are concentrated in the region of flow near the charged electrodes and depleted from the central region of flow between the charged electrodes. The system includes means for receiving purchasing data for the plurality of items, and means for generating a purchase order list from the purchasing data, wherein the purchase order list comprises a list of the plurality of items and purchasing data for each item. The lists may be fixed or selectable.