 Usually, in smaller retail outlets, POS displays are supplied by the manufacturer of the products, and also sited, restocked and maintained by one of their regular salespersons.However, this is less common in large supermarkets as they can control the activities of their suppliers due to their large purchasing power, and prefer to use their own material designed to be consistent with their corporate theming and store layout.Common items that may appear in POS displays year-round are batteries, soft drinks, candy, chewing gum, magazines, comics, tobacco, and writable CDs and DVDs.