The Innovation of Grocery Store

A At the beginning of the 20th century, grocery stores in the United States were full-service. A customer would ask a clerk behind the counter for specific items and the clerk would package the items, which were limited to dry goods. If they want to save some time, they have to ask a delivery boy or themselves to send the note of what they want to buy to the grocery store first and then go to pay for the goods later. These grocery stores usually carried only one brand of each good. There we...