Inside the Amazon operation

New York (CNNMoney) – The future of Amazon has arrived, and it's not a drone.

The online mega-retailer on Monday unveiled its next-generation fulfillment centers, complete with gigantic robotic arms and machines to help prepare customer orders.

Back-end improvements may never be seen by customers, but will reduce the time between when an order is placed and when it arrives on a doorstep, Amazon said. It may also help prevent the kind of fiasco Amazon suffered last year when many orders weren't delivered in time for Christmas.

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