Stores put men's clothes on the upper floors and women's clothes near the door. This is because men go shopping to "buy clothes", not to "browse", but women can

Stores put men's clothes on the upper floors and women's clothes near the door. This is because men go shopping to "buy clothes", not to "browse", but women can be lured into a store by an attractive display and nice racks of clothes on the first level. My guess is people buying books know what they want but there are a lot of customers who could be tempted into buying Amazon's cloud services.