What gives Amazon an edge over the competition. 1) Inventory management - If their web site says it is in stock, you can pretty much count on it being true. N

What gives Amazon an edge over the competition. 1) Inventory management - If their web site says it is in stock, you can pretty much count on it being true. Not so with some of the competition. 2) Delivery - Their in-house system puts the product on your doorstep faster than anyone else.