The most typical example is the e-commerce services. Commercial sites were set up to serve on a lot of services online trading flourished in the age of technology. We do not need to take place to see the goods sold, only a few clicks to find information, and then you like what you ordered. And e-commerce is almost imperative comes with e-mail. Because e-mail will be "part of paper" to verify the information and to order, help us quickly in placing and buying, not through the procedure directly fussy when shopping.
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