According to Forrester Research, “Despite an ongoing industry debate about how to define tablets, Forrester believes they should be classified as a form of personal computer. Tablet sales in the US will go from a modest 3.5 million units in 2010 to 20.4 million units in 2015, a 42 percent compound annual growth rate. Starting in 2012, tablets will outsell netbooks, and by 2014, more consumers will use tablets than use netbooks. In 2015, tablets will constitute 23 percent of PC unit sales.”