Acer unveils tablets in three screen sizes

Chief Executive Gianfranco Lanci said the tablets would have 5-, 7-, and 10-inch screens, running on Google’s GOOG Android software. A second 10-inch tablet will run on Microsoft’s Windows.

The WiFi-only models of the tablets would come out in April 2011, while the third-generation (3G)-capable models would arrive about a month later. The 5-inch tablet doubles as smartphone.