How Do You Close Apps on the Surface Tablet?

It's been a while now since Microsoft Surface-ed with its tablet which instantly became wishful by many tablet users for its design, battery life, and features etc. Looking at how vast the tablet market is, Microsoft Surface has seemed to be well received by existing and prospective users for their tablet needs, with carving itself a niche in competition with Amazon's Kindle, Apple's iPad, and Google's Nexus among others.

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