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Tablet computers

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Tablet computers

For the computer input device, see Graphics tablet. For other uses, see Tablet.
"Convertible (computer)" redirects here. For the IBM computer of this name, see IBM PC Convertible.

A tablet computer, or simply tablet, is a mobile computer with display, circuitry and battery in a single unit. Tablets are equipped with sensors, including cameras, microphone, accelerometer and touchscreen, with finger or stylus gestures replacing computer mouse and keyboard. Tablets may include physical buttons, e.g., to control basic features such as speaker volume and power and ports for network communications and to charge the battery. An on-screen, pop-up virtual keyboard is usually used for typing. Tablets are typically larger than smart phones or personal digital assistants at 7 inches (18 cm) or larger, measured diagonally.[1][2][3]

Hybrids that include detachable keyboards have been sold since the mid-1990s. Convertible touchscreen notebook computers have an integrated keyboard that can be hidden by a swivel or slide joint. Booklet tablets have dual-touchscreens and can be used as a notebook by displaying a virtual keyboard on one of the displays.

Conceptualized in the mid-20th century and prototyped and developed in the last two decades of that century, the devices became popular in 2010.

As of March 2012, 31% of U.S. Internet users were reported to have a tablet, which was used mainly for viewing published content such as video and news.[4] Among tablets available in 2012, the top-selling line of devices was Apple's iPad with 100 million sold by mid October 2012 since its release on April 3, 2010,[5] followed by Amazon's Kindle Fire with 7 million, and Barnes & Noble's Nook with 5 million.[6][7][8] As of May 2013, over 70% of mobile developers were targeting tablets[9] (vs. 93% for smartphones and 18% for feature phones).

History

The tablet computer and its associated operating system began with the development of pen computing.[10] Electrical devices with data input and output on a flat information display existed as early as 1888 with the telautograph,[11] which used a sheet of paper as display and a pen attached to electromechanical actuators. Throughout the 20th century devices with these characteristics have been imagined and created whether as blueprints, prototypes, or commercial products. In addition to many academic and research systems, several companies released commercial products in the 1980s.

Fictional and prototype tablets

Tablet computers appeared in a number of works of science fiction in the second half of the 20th century, with the depiction of Arthur C. Clarke's NewsPad,[12] in Stanley Kubrick's 1968 film 2001: A Space Odyssey, the description of Calculator Pad in the 1951 novel Foundation by Isaac Asimov, the Opton in the 1961 novel Return from the Stars by Stanislaw Lem, The Hitchhikers Guide to the Galaxy in Douglas Adams 1978 comedy of the same name, and the numerous devices depicted in Gene Roddenberry 1966 Star Trek series, all helping to promote and disseminate the concept to a wider audience.[13]

In 1968 computer scientist Alan Kay envisioned a KiddiComp, while a PhD candidate[14][15] he developed and described the concept as a Dynabook in his 1972 proposal: A personal computer for children of all ages,[16] the paper outlines the requirements for a conceptual portable educational device that would offer functionality similar to that supplied via a laptop computer or (in some of its other incarnations) a tablet or slate computer with the exception of the requirement for any Dynabook devise offering near eternal battery life. Adults could also use a Dynabook, but the target audience was children.

The sci-fi TV series Star Trek The Next Generation featured tablet computers which were designated as "padds".

In 1994 the European Union initiated the 'OMI-NewsPAD' project (EP9252), inspired by Clarke and Kubrick's fictional work.[17] Acorn Computers developed and delivered an ARM-based touch screen tablet computer for this program, branded the NewsPad. The Barcelona-based trial ended in 1997.[18]

During the Nov, 2000 COMDEX Microsoft used the term Tablet PC to describe a prototype handheld device they were demonstrating.[19] and 2001.[20][21]

In 2001 Ericsson Mobile Communications announced an experimental product named the DelphiPad which was developed in cooperation with the Centre for Wireless Communications in Singapore, with touch-sensitive sceeen, Netscape Navigator as web browser and Linux as its operating system.[22][23]

Early devices

Following their earlier tablet-computer products such as the Pencept PenPad[24][25] and the CIC Handwriter,[26] in September 1989, GRiD Systems release the first commercially available tablet-type portable computer, the GRiDPad.[27] All three products were based on extended versions of the MS-DOS operating system.

In 1991 AT&T released their first EO Personal Communicator, this was one of the first commercially available tablets and ran the GO Corporation's PenPoint OS on AT&T's own hardware, including their own AT&T Hobbit CPU.

Apple Computers launched the Apple Newton stylus based computer in 1993. It utilised Apple's own new Newton OS, initially running on hardware manufactured by Motorola and incorporating an ARM CPU, that Apple had specifically co-developed with Acorn Computers. The operating system and platform design were later licensed to Sharp and Digital Ocean, who went on to manufacture their own variants.

In 1996 Palm, Inc. released the first of the Palm OS based PalmPilot touch and stylus based PDA, the touch based devices initially incorporating a Motorola Dragonball (68000) CPU.

Intel announced a StrongARM[28] processor-based touchscreen tablet computer in 1999, under the name WebPAD. It was later re-branded as the "Intel Web Tablet".[29]

In April 2000 Microsoft launched the Pocket PC 2000, utilising their touch capable Windows CE 3.0 operating system. The devices were manufactured by several manufacturers, based on a mix of: x86, MIPS, ARM, and SuperH hardware.

In 2002, Microsoft attempted to define the Microsoft Tablet PC[30] as a mobile computer for field work in business,[31] though their devices failed, mainly due to pricing and usability decisions that limited them to their original purpose.[32]

In 2005 Nokia released the first of its Internet Tablet range, the Nokia 770. These tablets ran a Debian based Linux OS called Maemo.

Android was the first of today's dominating platforms for tablet computers to reach the market. In 2008 the first plans for Android-based tablets appeared. The first products were released in 2009. Among them was the Archos 5 that was first released with a proprietary operating system and later (in 2009) released with Android 1.4. The Camangi WebStation was released in Q2 2009. The first LTE Android tablet appeared late 2009 and was made by ICD for Verizon. This unit was called the Ultra, but a version called Vega was released around the same time. Ultra had a 7 inch display while Vega's was 15 inches. Many more products followed in 2010. Several manufacturers waited for Android Honeycomb, specifically adapted for use with tablets, which debuted in February 2011.

2010 and afterwards

Today's tablets use capacitive touchscreens with multi-touch, unlike earlier stylus-driven resistive touchscreen devices. After 2010, multi-touch and other natural user interface features, as well as flash memory solid state storage and "instant on" warm-booting; external USB and Bluetooth keyboards defined tablets. Some have 3G mobile telephony applications.

Most tablets released since mid-2010 use a version of an ARM processor for longer battery life. The ARM Cortex family is powerful enough for tasks such as internet browsing, light production work and mobile games.[33]

As with smartphones, most mobile tablet apps are supplied through online distribution, rather than boxed software or direct sales from software vendors. These sources, known as "app stores", provide centralized catalogues of software and allow "one click" on-device software purchasing, installation and updates. The app store is often shared with smartphones that use the same operating system.[34]

Apple is often credited for defining a new class of consumer device.[35] It shaped the commercial market for tablets in the following years.[36] iPads and competing devices have been tested by the US military.[37] The most successful tablet is the Apple iPad, using the iOS operating system. Its debut in 2010 pushed tablets into the mainstream.[38][39] Samsung's Galaxy Tab and others followed, continuing the trends towards the features listed above.

In 2013, Samsung announced a tablet running Android and Windows 8 operating systems concurrently; switching from one operating system to the other and vice versa does not require restarting the device, and data can be synchronized between the two operating systems.[40] The device, named ATIV Q, was scheduled for release in late 2013 but has since been delayed.[41] Asus has announced the Transformer Book Trio, a tablet that is capable of running two operating systems, Windows 8 and Android.[42]

Touch interface

A key component among tablet computers is touch input. This allows the user to navigate easily and type with a virtual keyboard on the screen. The first tablet to do this was the GRiDPad by GRiD Systems Corporation; the tablet featured both a stylus, a pen-like tool to aid with precision in a touchscreen device as well as an on-screen keyboard.[43]

The system must respond to touches rather than clicks of a keyboard or mouse, which allows integrated hand-eye operation, a natural use of the somatosensory system.[44][45][46] This is even more true of the more recent multi-touch interface, which often emulate the way objects behave.

Handwriting recognition

Some tablet personal computers such as the Galaxy Note 10 support a stylus and support handwriting recognition. Finger-driven screens are potentially better suited for entering "variable-width stroke-based" characters, such as Chinese/Japanese/Korean writing, due to their built-in capability of "pressure sensing". Much of this potential is unused, except in digital art applications such as Autodesk Sketchbook.[47][48]

Touchscreen hardware

Touchscreens are usually one of two forms;

  • Resistive touchscreens are passive and respond to pressure on the screen. They allow a high level of precision, useful in emulating a pointer as is common in tablet computers) but may require calibration. Because of the high resolution, a stylus or fingernail is often used. Stylus-oriented systems are less suited to multi-touch.
  • Capacitive touchscreens tend to be less accurate, but more responsive than resistive devices. Because they require a conductive material, such as a finger tip, for input, they are not common among stylus-oriented devices, but are prominent on consumer devices.

Some tablets can recognize individual palms, while some professional-grade tablets use pressure-sensitive films, such as those on graphics tablets. Some capacitive touch-screens can detect the size of the touched area and the pressure used.[49]

Features

Hardware
  • High-definition, anti-glare display
  • Wireless internet connectivity (usually with Wi-Fi standard and optional mobile broadband)
  • GPS satellite location
  • Front- and/or back- facing camera(s) for photographs and video
  • Lower weight and longer battery life than a comparably-sized laptop
  • Bluetooth for connecting peripherals and communicating with local devices
  • Docking station: Keyboard and USB port(s)
Software
  • Mobile web browser
  • Reader for digital books, periodicals and other content
  • Downloadable apps such as games, education and utilities
  • Portable media player function including video playback
  • E-mail and social media
  • Mobile phone functions (messaging, speakerphone, address book)
  • Video-teleconferencing
Data storage
Additional inputs

Besides a touchscreen and keyboard, some tablets can also use these input methods:

  • Accelerometer: Detects the physical movement and orientation of the tablet. This allows the touchscreen display to shift to either portrait or landscape mode. In addition, tilting the tablet may be used as an input (for instance to steer in a driving game).
  • Ambient light and proximity sensors, which help distinguish between intentional and unintentional touches.
  • Speech recognition
  • Gesture recognition

Sizes


Slates

A slate's size may vary, starting from 7 inches (approximately 18 cm).[50] In the larger than 10-inch category reside the Toshiba Excite at 13.3 inches[51] and the Dell XPS 18 at 18.4 inches.[52] As of March 2013, the thinnest tablet on the market was the Sony Xperia Tablet Z only 0.27 inches (6.9 mm) thick.[53] In October 2013, HP announced HP Slate 21 All-in-One (Hybrid) with 21.5" IPS display complete with keyboard and mouse. It runs on Android, but has no internal battery.[54]

Mini tablets

Mini tablets are smaller and lighter than standard tablets. The first successful ones were introduced by Samsung (Galaxy Tab 7-inch), Barnes and Noble (the Nook Tablet), Blackberry Playbook, and Amazon (the Kindle Fire) in 2011, and by Google (the Nexus 7) in 2012. Most of them work like a larger tablet, though some do not have all the features, functions, or capacity found in bigger tablet computers.

In 2012, Apple released the iPad Mini. Its size is 7.9 inches, about 2 inches smaller than the regular size iPad tablet. Apple announced the new smaller-sized tablet on October 23, 2012.[55]

Amazon released an upgraded version of the Kindle Fire, called the Kindle Fire HD, on September 14, 2012, with higher resolution, more features, and a higher capacity than the original Kindle Fire. The Kindle Fire HD mini is 7 inches in size.[56]

Phablets

Main article: Phablet

Since 2010, crossover touch-screen devices with screens greater than 5-inches have been released. That size is generally considered larger than a

Dedicated keyboards

Tablets with dedicated keyboards form the boundary between slate tablets and laptop computers.

Convertibles

Convertible tablets have a slate tablet top-half with a (sometimes detachable) keyboard bottom-half. They more closely resemble laptops, and are heavier and larger than slates. While some convertibles (such as the Asus Transformer series) run Android, the release of Windows 8 increased the prominence of this form factor among the laptop market.

Typically, the base of a convertible attaches to the display at a single joint called a swivel hinge or rotating hinge. The joint allows the screen to rotate through 180° and lie against the back of the keyboard to provide a flat writing surface. This design, although the most common, creates a physical point of weakness.

The Panasonic Toughbook 19, for example, is advertised as a more durable convertible notebook. The HP EliteBook 2760p convertible notebook uses a reinforced hinge that protrudes slightly from the rear of the unit. And the Acer TravelMate C210, has a sliding design in which the screen slides up from the slate-like position and locks into place to provide the laptop mode.

The first tablet to have a sliding screen was the Samsung Sliding PC7 Series,[60] a tablet with Intel Atom processor and a sliding screen that allows the it to be used as a laptop or slate tablet when the screen is locked in place covering the whole keyboard. It is intended to combine the virtues of tablet PCs with those of notebooks. The Inspiron Duo from Dell rotates the screen horizontally when opened.

Further information: List of convertible tablet computer brands

Hybrids

Hybrid tablets have a standard tablet base with a detachable keyboard that resembles a laptop keyboard. They are usually sold together as parts of the same product, unlike slates, whose keyboards are an optional accessory.

The term hybrid was coined by users of the HP/Compaq TC1000 and TC1100 series.

Booklets

Booklets are dual-touchscreen tablet computers with a clamshell design that folds like a laptop. Examples include the Sony Tablet P (which was considered a flop)[61] and the aborted Microsoft Courier.

System architecture

Two major architectures dominate the tablet market,[62] ARM Holdings' ARM architecture and Intel's x86.

Intel's x86, including x86-64 has powered the "IBM compatible" PC since 1981 and Apple's Macintosh computers since 2006. The CPUs have been incorporated into tablet PCs over the years and generally offer greater performance along with the ability to run full versions of Microsoft Windows, along with Windows desktop and enterprise applications. Non-Windows based x86 tablets include the JooJoo. Intel announced plans to enter the tablet market with its Atom in 2010;[63][64] see the next section for Intel processors for the tablet market.

ARM has been the CPU architecture of choice for manufacturers of smartphones (95% ARM), PDAs, digital cameras (80% ARM), set-top boxes, DSL routers, smart televisions (70% ARM), storage devices and tablet computers (95% ARM).[65][third-party source needed] This dominance began with the release of the mobile-focused and comparatively power-efficient 32-bit ARM610 SoC (System on a chip) originally designed for the Apple Newton and Acorn A4 in 1993. The chip was adopted by Psion, Palm and Nokia for PDAs and later smartphones, camera phones, cameras, etc. ARM's licensing model supported this success by allowing device manufacturers to licence, alter and fabricate custom SoC derivatives tailored to their own products. This has helped manufacturers extend battery life and shrink component count along with the size of devices.

The multiple licensees ensured that multiple fabricators could supply near-identical products, while encouraging price competition. This forced unit prices down to a fraction of their x86 equivalents. The architecture has historically had limited support from Microsoft, with only Windows CE available, but with the 2012 release of Windows 8, Microsoft announced additional support for the architecture, shipping their own ARM-based tablet computer, branded the Microsoft Surface, as well as an x86-64 Intel Core i5 variant branded as Microsoft Surface Pro.[66][67][68][69]

Intel tablet platforms

Oak Trail platform (2011)

Intel's first generation tablet platform (codenamed Oak Trail ) contains a 45 nm Intel Atom processor (codenamed Lincroft) and a 65 nm Platform Controller Hub (codenamed Whitney Point). Since the memory controller and graphics controller are all now integrated into the processor, the northbridge has been removed and the processor communicates directly with the southbridge via the DMI bus interface.

Atom Oak Trail platform
Mobile chipset a 65 nm Intel SM35 PCH (codenamed Whitney Point)
Mobile processor a 45 nm Intel Atom processor (codenamed Lincroft) with integrated GMA 600 graphics (PowerVR SGX 535 based)
Wireless network a wireless radio

Clover Trail platform (2012)

Intel's second generation table platform (codenamed Clover Trail) contains a 32 nm Intel Atom SoC (codenamed Cloverview).

Atom Clover Trail platform
Mobile processor a 32 nm Intel Atom SoC (codenamed Cloverview) with integrated CPU (codenamed Saltwell) and graphics (PowerVR SGX 545 based)
Wireless network a wireless radio

Bay Trail platform (2013)

Intel's third generation tablet platform (codenamed Bay Trail) contains a 22 nm Intel Atom SoC (codenamed Valleyview).

Atom Bay Trail platform
Mobile processor an Intel Atom SoC (codenamed Valleyview) with integrated CPU (codenamed Silvermont) and graphics (Gen 7)
Wireless network a wireless radio

Cherry Trail platform (2014)

Intel's fourth generation tablet platform (codenamed Cherry Trail) contains a 14 nm Intel Atom SoC (codenamed Cherryview).[70]

Atom Cherry Trail platform
Mobile processor an Intel Atom SoC (codenamed Cherryview) with integrated CPU (codenamed Airmont) and graphics (Gen 8)
Wireless network a wireless radio

Willow Trail platform

Intel's fifth generation tablet platform (codenamed Willow Trail) contains a 14 nm Intel Atom SoC (codenamed Broxton).

Atom Willow Trail platform
Mobile processor an Intel Atom SoC (codenamed Broxton) with integrated CPU (codenamed Goldmont) and graphics (Gen 9)
Wireless network a wireless radio

Operating system

Tablets, like conventional PCs, run multiple operating systems (though dual-booting on tablets is relatively rare). These operating systems come in two classes, desktop-based and mobile-based ("phone-like") OS. Desktop-based tablets usually are thicker and heavier, require more storage, more cooling and give less battery life, but can run desktop applications such as Photoshop in addition to mobile apps and have more ports,[71] while mobile-based tablets are the reverse, only run mobile apps.

At the end of Q1 2013, GlobalWebIndex noted that in 2 years tablet usage increased by 282 percent, with 156 million Android Tablet users and 122 million iPad users making up 75 percent.[72]

Android

Android is a Linux-based operating system that Google offers as open source under the Apache license. It is a designed primarily for mobile devices such as smartphones and tablet computers. Android supports low-cost ARM systems. Many such systems were announced in 2010.[73] However, much of Android's tablet initiative came from manufacturers, while Google primarily focused on smartphones and restricted the App Market from non-phone devices.[74]

Vendors such as Motorola[75] and Lenovo[76] delayed deployment of their tablets until after 2011, when Android was reworked to include more tablet features.[77] Android 3.0 (Honeycomb) and later versions support larger screen sizes, mainly tablets, and have access to the Google Play service. Android includes operating system, middleware and key applications.

Other vendors sell customized Android tablets such as Nook and Kindle Fire, which are used to consume mobile content and provide their own app store, rather than using the larger Google Play system, thereby fragmenting the Android market.[78]

Google introduced the Nexus 7 and Nexus 10 tablets in 2012. Hardware makers that have shipped Android tablets include Acer, Asus, Samsung, Toshiba and Sony.[79]

Blackberry OS

The BlackBerry PlayBook is a tablet computer announced in September 2010 that runs the BlackBerry Tablet OS.[80] The OS is based on the QNX system that Research in Motion acquired in early 2010. Delivery to developers and enterprise customers was expected in October 2010. The BlackBerry PlayBook was officially released to US and Canadian consumers on April 19, 2011.

iOS

Main articles: iOS and iPad

The iPad runs iOS, which was created for the iPhone and iPod Touch. Although built on the same underlying Unix implementation as MacOS, its user interface is radically different. iOS is designed for fingers and has none of the features that required a stylus on earlier tablets. Apple introduced multi-touch gestures, such as moving two fingers apart or together to zoom in or out, also known as "pinch to zoom".[81] iOS is built for the ARM architecture.[82]

Modbook

Main article: ModBook

Previous to the iPad, Axiotron introducedMessagePad introduced in 1993.

Linux

The ProGear by FrontPath was an early implementation of a Linux tablet that used a Transmeta chip and a resistive digitizer. The ProGear initially came with a version of Slackware Linux, and later with Windows 98. They can run many different operating systems. However, the device is no longer for sale and FrontPath has ceased operations. Many touch screen sub-notebook computers can run any of several Linux distributions with little customization.

X.org now supports screen rotation and tablet input through Wacom drivers, and handwriting recognition software from both the Qt-based Qtopia and GTK+-based Internet Tablet OS provide open source systems. KDE's Plasma Active is a graphical environment for tablet.[84]

Linux open source note taking software includes Xournal (which supports PDF file annotation), Gournal (a Gnome based note taking application), and the Java-based Jarnal (which supports handwriting recognition as a built-in function). A standalone handwriting recognition program, CellWriter, requires users to write letters separately in a grid.

Many desktop distributions include tablet-friendly interfaces smaller devices. These open source libraries are freely available and can be run or ported to devices that conform to the tablet PC design. Maemo (rebranded MeeGo in 2010), a Debian Linux based user environment, was developed for the Nokia Internet Tablet devices (770, N800, N810 & N900). It is currently in generation 5, and has many applications. Ubuntu uses the Unity UI, and many other distributions (such as Fedora) use the Gnome shell (which also supports Ubuntu).

Canonical has hinted that Ubuntu will be available on tablets by 2014.[85][dated info]

TabletKiosk was the first to offer a hybrid digitizer / touch device running openSUSE Linux.

2005

Nokia entered the tablet space in May 2005 with the Nokia 770 running Maemo, a Debian-based Linux distribution custom-made for their Internet tablet line. The product line continued with the N900, with phone capabilities. The user interface and application framework layer, named Hildon, was an early instance of a software platform for generic computing in a tablet device intended for internet consumption.[86] But Nokia didn't commit to it as their only platform for their future mobile devices and the project competed against other in-house platforms and later replaced it with the Series 60.[87]

Following the launch of the Ultra-mobile PC, Intel started the Mobile Internet Device initiative, which took the same hardware and combined it with a tabletized Linux configuration. Intel co-developed the lightweight Moblin (mobile Linux) operating system following the successful launch of the Atom CPU series on netbooks.

Tizen

Main articles: Maemo, MeeGo and Tizen

MeeGo was a Linux-based operating system developed by Intel and Nokia that supports Netbooks, Smartphones and Tablet PCs. In 2010, Nokia and Intel combined the Maemo and Moblin projects to form MeeGo. The first tablet using MeeGo is the Neofonie WeTab launched September 2010 in Germany. The WeTab uses an extended version of the MeeGo operating system called WeTab OS. WeTab OS adds runtimes for Android and Adobe AIR and provides a proprietary user interface optimized for the WeTab device. On 27 September 2011 the Linux Foundation announced that MeeGo would be replaced in 2012 by Tizen.[88]

Windows

Windows 3.1 to 7

Main article: Microsoft Tablet PC

Following Windows for Pen Computing for Windows 3.1 in 1991, Microsoft supported tablets running Windows XP under the Microsoft Tablet PC name.[89] According to Microsoft[90] in 2001, "Microsoft Tablet PCs" are pen-based, fully functional x86 PCs with handwriting and voice recognition functionality. Tablet PCs used the same hardware as laptops but added support for pen input. Windows XP Tablet PC Edition provided pen support. Tablet support was added to both Home and Business versions of Windows Vista and Windows 7. Tablets running Windows could use the touchscreen for mouse input, hand writing recognition and gesture support. Following Tablet PC, Microsoft announced the Ultra-mobile PC initiative in 2006 which brought Windows tablets to a smaller, touch-centric form factor.[91][92] In 2008, Microsoft showed a prototype of a two-screen tablet called Microsoft Courier, but cancelled the project. A model of the Asus Eee Pad shown in 2010 was to use Windows CE but switched to Android.[93]

Windows 8

Main articles: Microsoft Surface and List of Windows 8 and RT tablet devices

In October 2012, Microsoft released Windows 8, which features significant changes to various aspects of the operating system's user interface and platform which are designed for touch-based devices such as tablets. The operating system also introduced an application store and a new style of application optimized primarily for use on tablets.[94][95] Microsoft also introduced Windows RT, an edition of Windows 8 for use on ARM-based devices.[96] The launch of Windows 8 and RT was accompanied by the release of devices with the two operating systems by various manufacturers (including Microsoft themselves, with the release of Surface), such as slate tablets, hybrids, and convertibles.[97]

Discontinued

WebOS

Hewlett Packard announced that the TouchPad, running WebOS 3.0 on a 1.2 GHz Snapdragon CPU, would be released in June 2011. On August 18, 2011, HP announced the discontinuation of the TouchPad, due to sluggish sales.[98] In February 2013, HP announced they had sold WebOS to LG Electronics.[99]

Application market

Mobile device suppliers typically adopt walled garden approach, wherein the supplier controls what applications are available. Software development kits are restricted to approved developers. This can be used to reduce the impact of malware, provide material with an approved content rating, control application quality and exclude competing vendors.[100]

Apple, Google, Amazon and Barnes and Noble all adopted the strategy. The latter originally allowed arbitrary apps to be installed,[101][102][103] but, in December 2011, excluded third parties.[104][105][106][107][108]

Proponents of open source software violate the spirit of personal control that traditional personal computers have always provided.[109][110][111]

Market share

As of October 2012, display screen shipments for tablets began surpassing shipments for laptop display screens.[112]

According to a survey conducted by the Online Publishers Association (OPA) in March 2012, 31% percent of Internet users in the United States owned a tablet, up from 12% in 2011. The survey also found that 72% of tablet owners had an iPad, while 32% had an Android tablet. By 2012, Android tablet adoption had increased. 52% of tablet owners owned an iPad, while 51% had an Android-powered tablet.[113] (Percentages do not add up to 100% because some tablet owners own/use more than one type of tablet.)[113]

Tablet market share (in percent)[114]
Vendor Q3 2013 Q3 2012 Year-over-Year
Increase/(decrease)
Apple 29.6 40.2 (10.6)
Samsung 20.4 12.4 8.0
Asus 7.4 6.6 0.8
Others 42.6 40.8 1.8

Note: Others consists of small vendors with market share about one percent or mostly less. In one year Apple market share dropped significantly in the other side Android Vendors market share increased with Samsung dominancy.

See also

References

  1. Andy Rubin's demo of Motorola Honeycomb tablet
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