According to a survey carried our by a large market research company, three out of four families buy pre- cooked meals regularly, because they cannot find the time to cook. The same survey found that three out of five people buy food at expensive local stores because there is often no time to get to the supermarket. Because of the changes in modern lifestyles, people need to be able to shop at all hours of the day In the future, many other stores as well as supermarkets will be open all day and night. In short, we will become a 24-hour society.