Bagger, or Bag boy, is an unofficial title given to courtesy clerks at supermarkets. The primary duties of a bagger revolve around putting groceries into a bag and then into a shopping cart. Upon requests, baggers may take the groceries out to a customer's car or supply other forms of service. Some baggers in stores will do this unless the customer refuses and wishes to bring their own groceries out. Depending on the store, other duties may include cleaning the store, cleaning the bathrooms, collecting carts, sweeping the store, fixing and maintaining the bottle recycling machines, giving customer assistance, putting items customers initially intended to purchase but changed their mind about at the register back on the shelf (usually called "back shop" or "returns"), and reorganizing products on aisles to make a more neat appearance (commonly called "blocking", "facing" or "conditioning"). The duties vary vastly depending on the store and union regulations, and some of previous duties in fact, are actually prohibited from being done at some stores by a courtesy clerk due to union contracts. The title of bagger is the result of an extensive evolution of the position of "courtesy clerk". The title "bag boy" was adopted for some time, until it was finally shortened to "bagger".