
Like iPhone and iPod Touch, the iPad is controlled by a multitouch display—a departure from most previous tablet computers, which used a pressure-triggered stylus—as well as a virtual onscreen keyboard in lieu of a physical keyboard. The iPad uses a Wi-Fi data connection to browse the Internet, load and stream media, and install software. Some models also have a 3G wireless data connection which can connect to HSPA data networks. The device is managed and synced by iTunes on a personal computer via USB cable.
Apple released the first iPad in April 2010, and sold 3 million of the devices in 80 days.[14] During 2010, Apple sold 14.8 million iPads worldwide,[15][16][17] representing 75 percent of tablet PC sales at the end of 2010.[18] By the release of the iPad 2 in March 2011, more than 15 million iPads had been sold — more than all other tablet PCs combined.[7]