There are two choices for distribution centers that rely on bar codes: laser scanners and imagers. Imagers might be somewhat pricier, but they are also quicker and better at reading degraded bar codes. Imagers are also necessary to read some types of 2D bar codes.
Grocery chains ALDI, Grocery Outlet and Save-A-Lot, all offering reduced prices and a limited selection of products, plan to expand as customers add the stores to their shopping options. ALDI plans to open as many as 100 stores this year, Save-A-Lot intends to add 1,200 within five years and Grocery Outlet will add 15 this year.