is a line of tablet computers designed, developed and marketed by Apple Inc., which run the iOS mobile operating system. The first iPad was released on April 3, 2010; the most recent iPad models are the iPad (2018), released on March 27, 2018, the 10.5-inch (270 mm) and 12.9-inch (330 mm) 2G iPad Proreleased on June 13, 2017. The user interface is built around the device’s multi-touch screen, including a virtual keyboard. All iPads can connect via Wi-Fi; some models also have cellular connectivity.
As of January 2015, Apple had sold more than 250 million iPads, though sales peaked in 2013 and it is now the second-most popular kind of tablet computer, by sales, after Android-based types.
An iPad can shoot video, take photos, play music, and perform Internet functions such as web-browsing and emailing. Other functions – games, reference, GPS navigation, social networking, etc. – can be enabled by downloading and installing apps. As of March 2016, the App Store has more than one million apps for the iPad by Apple and third parties.