The iPad is a line of tablet computers designed, developed and marketed by Apple Inc. primarily as a platform for audio-visual media including books, periodicals, movies, music, games, and web content. Its size and weight falls between those of contemporary smartphones and laptop computers. The iPad runs the same operating system as the iPod Touch and iPhone—and can run its own applications as well as iPhone applications. Without modification, and with the exception of websites, it will only run programs approved by Apple and distributed via its online store.
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 or EV-DO 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.[16] During 2010, Apple sold 14.8 million iPads worldwide, representing 75 percent of tablet PC sales at the end of 2010 By the release of the iPad 2 in March 2011, more than 15 million iPads had been sold other tablet PCs combined.[citation needed In 2011, it is expected to take 83 percent of the tablet computing market share in the United States.
Technical specifications
Model iPad (original) iPad 2
Announcement date January 27, 2010 March2,2011
US Release date April 3, 2010 March 11, 2011
Discontinued date March 2, 2011
Display 9.7 inches (25 cm) multitouch display at a resolution of 1024 × 768 pixels with LED backlighting and a fingerprint and scratch-resistant coating
Processor 1 GHz Apple A4 system-on-a-chip 1 GHz (dynamically clocked) dual-core Apple A5 system on a chip
Memory 256 MB DDR RAM built into Apple A4 package
512 MB DDR2 (1066 Mbps data rate) RAM built into Apple A5 package
Storage 16, 32, or 64 GB
Wireless Wi-Fi Wi-Fi (802.11a/b/g/n), Bluetooth 2.1+EDR
Wi-Fi+3G 3G cellular HSDPA, 2G cellular EDGE on 3g models
Geolocation Wi-Fi Wi-Fi,Apple location databases
Wi-Fi+3G Assisted GPS, Apple databases,Cellular network
Environmental sensors Accelerometer, ambient light sensor, magnetometer Additionally: gyroscope
Operating system iOS 4.3
Battery Built-in lithium-ion polymer battery; (10 hours video, 140 hours audio, 1 month standby
Weight 1.5 lb (680 g) 1.33 lb (600 g)
Dimensions 9.56×7.47×.528 in (243×190×13.4 mm) 9.5×7.31×.346 in (240×186×8.8 mm)
Mechanical keys Home, sleep, volume rocker, variable function switch (originally screen rotation lock, mute in iOS 4.2, either in 4.3)
Camera Back N/A 720p HD still and video camera
30fps and 5x digital zoom
Front N/A VGA-quality still camera
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