Take off the shelf is a phrase used to describe the process of removing an item from a store shelf in order to purchase it. It is often used in retail stores, where customers can take items off the shelf and bring them to the checkout counter. The phrase can also be used figuratively, to refer to taking something out of storage or off a list. In this case, the crossword solutions for the term are USE, UPC, and SKU. USE stands for Universal System of Exchange, which is a system used by retailers to track inventory and sales. UPC stands for Universal Product Code, which is a barcode used to identify products. Finally, SKU stands for Stock Keeping Unit, which is a unique identifier used to track inventory.