Coming in at No. 3 is Google's mobile tablet line Nexus. Google took home 8.8 percent of units sold in 2013, an increase of 3.1 unit shares from the previous year.
The Nexus 7 was the thinnest and lightest 7-inch tablet at the time it hit the market last summer. Starting at $229, this slate features the Android OS (of course), a 1,920-x-1,200 display and an above-average battery life.