The iPad is a tablet computer developed by Apple Inc. Announced on January 27, 2010, it is positioned in a category between a smartphone and a laptop computer.
Similar in functionality to a larger and more powerful iPhone or iPod touch, it runs a modified version of the same operating system (iPhone OS), with a user interface redesigned to take advantage of the larger screen. The iPad has a 9.7-inch (25 cm) LED backlit multi-touch display, 16 to 64 gigabytes (GB) of flash memory, Bluetooth, and a 30-pin dock connector to sync with iTunes and connect wired accessories. Two models have been announced: one with 802.11n Wi-Fi and one with 802.11n Wi-Fi and 3G (which can connect to HSDPA cellular networks), and Assisted GPS. Both models may be purchased with three different storage capacities.
As Apple's first device to use its iBookstore service and companion iBooks ebook reading application, the iPad has been compared with Amazon's Kindle and Barnes & Noble's Nook.