
The Seattle-based online retailer started off by reinventing the way books were sold. Then it redefined itself by hawking everything from furniture to electronics -- in the process challenging giant retailers such as Wal-Mart head-on.
More recently, the company doubled down on its dotcom roots through tablets, streaming video, and cloud computing. Transformation, though, comes at a steep price.
Can Amazon afford to keep being so daring?
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