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Tablet PC

A tablet PC is a mobile computer shaped in the form of a notebook or a slate with the capabilities of being written on through the use of digitizing tablet technology or a touchscreen. A user can use a stylus or digital pen to operate the computer without having to have a keyboard or mouse. A user can input text using the built-in handwriting recognition, on-screen keyboard, speech recognition, or a physical keyboard. Shorthand-like entry methods, which enable pen-driven input at touch-typing speeds, are also available, including AlphaTap and Shark.

Tablet PCs that include a built-in keyboard are called convertibles or hybrids. Ones that are only a screen with pen are called slate; they can use external wireless or USB keyboards. The most popular convertible tablet PCs are the Acer and Toshiba. The most popular slates are the Motion Computing/Gateway Computers, Fujitsu, and HP/Compaq.

Many tablet PCs use a Wacom digitizer, which delivers pen-position input to the computer at a fast rate. Tablets with these digitizers project a small magnetic field above the screen that interacts with electronics in the tablet's stylus. The user therefore is able to rest their hand on the screen without affecting the image or mouse pointer; only movement of the stylus affects the mouse pointer. (However, due to interference from other electronics within a tablet PC, many models suffer from "jitter", which makes some tasks difficult, e.g. slowly drawing straight lines, or writing small characters.) UC Logic and Finepoint make similar digitizers.

Introduction to Tablet PCs

Tablet PCs are different from laptop and desktop computers in a way that they use a modern touchscreen interface and dont have a mouse. They are most times smaller and more portable than most computer systems. Their one and only interface can make some software applications smoother to use, but Table PC's have some hardware restrictions which can make them slow down everyday tasks such as typing and Tablet PC gaming. Like other computers, tablets come in a variety of models and shapes and can run on a different scale of different operating system platforms.

About Tablet PC Hardware

Tablet PCs, not like the typical design of laptops, have only a single surface that functions as both the screen and the input device. Older tablets PCs usually had a resistive type of touch screen that involved a stylus for it to function properly, but newer Tablet PC models now use capacitive touch screens that may incorporate multi-touch support. Most tablet PCs include standard connection ports for using headphones, USB drives and other computer accessories, though available connectivity varies by model. Most tablet PCs incorporate Wi-Fi network connection, and many can also surf the Internet over-the-air using a service provider subscription. Combination devices such as the HP Pavilion tx2000, Asus Eee Pad Transformer and the Lenovo IdeaPad U1 Hybrid have both laptop and tablet features and utilize either a detachable tablet touchscreen or a rotatable screen for hybrid use.
About Tablet PC Operating Systems
Many different operating systems mainly run on tablet PCs, with the pre-installed OS dependent on the tablet's manufacturer and model. On tablet PCs Windows operating systems starting with Windows XP Tablet Edition support touch interfacing, with both Windows Vista and Windows 7 including native tablet support. Apple's popular iPad tablet device runs the proprietary iOS operating system that also powers Apple's iPhone and iPod Touch devices. Several manufacturers produce Android tablets that run the same OS as the Droid and Google Nexus smartphones. These include devices such as the Motorola Xoom and Samsung Galaxy Tab.

Tablet PC Benefits
A tablet's touch interface makes some common tasks more automatic, and the devices accomodate easy Web surfing and indication-based navigation. The extraordinary input also gives users permission to games and artistic apps that may be troublesome to control if you are using a typical mouse and keyboard. Also, Tablet PCs don't have moving parts but have a compact design which makes them good traveling companions, as they stay comfortable to use without a table or flat surface.

Tablet PC Cons
Tablet PCs don't a keyboard and that alone can make word processing and other typing-intensive applications more complex on tablet PCs, with most devices needing to depend on a virtual keyboard displayed within the touch screen. The use of external keyboards and accessories on a Tablet PC can reduce this issue, but take away from a tablet's inherent portability. The Tablet PCs have a compact frame also means that Tablet PCs many times don't possess the computing power of a laptop or a desktop computer system, and resource-intensive games and other applications may run slow on Tablet PC devices.

How Does the Tablet PC Work?
Tablet PC's are best considered as touch-screen PC's. Touch screens start their functioning tasks as soon as a stimulus is adapted. Generally, touch screens on tablet PCs can operate with the use of any stimulus, but some have specific stimuli. In the case of tablet PC's, this stimulus is generally a stylus pen.

Conductive and resistive sensors, in the touch screen of the table PC, work together to recieve the signal on the location inside the screen where you touched. The sensors each have an individual electrical field streaming through them. When pressure is applied on the tablet PCs touch screen, the sensors meet in the exact same spot, and the electrical field changes voltage. The processor of the tablet PC recognizes this alteration in the electrical field as the beginning of an action and immediately starts advancing with the action event.

The change of the electrical field on the tablet PC touch screen, allows the computer processor to determine the coordinates of the location you touched. This allows the table PC to know the exact location on the screen that you put your stylus. This is what causes the tablet PC to select the proper file, or open the proper application, or even put your handwriting in the correct field.

Once the tablet PC knows where you touched it on the screen, a special driver translates the impulse into something the tablet PC's processor can understand. This is very corresponding in action to what arrives when you click your mouse, or keyboard. You can add a keyboard to your tablet PC if you desire, and even add a mouse, though this does somewhat defeat the purpose of a touch-screen. Some customers like to use tablet PC's like standard computers and only like to use the touch screen when doing tasks like drawing, or writing quick notes.

The tablet PC processor processes the recieved information, and acts subsequently, whether it be a click, a slide, or writing. The entire process happens in small period of time, enabling you to do multiple actions at once. For instance, double-clicking an application on the tablet PC to open it, can be done with the speed and precision of using a standard mouse. The computer process both clicks independently, and is able to recognize the intent of the user.

The hand writing recognition feature of tablet PC's functions by converting the hand writing into an image. The computer logs this image, and then analyzes it. Any future writing is converted into an image, and checked against all the other images that have been stored and analyzed. This allows the computer to recognize what you are writing, for when it converts your hand writing into type.

Which type of Tablet PC is Best For You?

Android tablet PC
The Google Android operating system may have started as a smartphone OS, but that did not stop manufacturers from porting it to tablets and eReaders. Google has since taken note, and with Honeycomb (version 3.0) and each subsequent update, Android is found on more devices than any other OS, and features an ever-expanding app market that rivals Apple’s in size and scope. Android is an open operating system, meaning any developer or manufacturer can install it on a product, which explains its pervasiveness that extends even to eReaders.

Windows tablet PC
Running Windows on a tablet PC is the operating system for those who want to construct something, rather than consume and devour , which is why enterprise tablet users often prefer Windows slates. Typically a tablet PC along with an active pen and equipped handwriting recognition, what Windows slates lack in graphics and cool interfaces, they more than recompense it for in functionality. The Windows operating system proposes primarily the same experience as the OS found on a laptop or desktop, complete with comparable icons, files and menu structure.

iPad (IOS) tablet PC
With the iPad tablet PC, Apple redefined the tablet conception, from awkwardly heavy and costly devices to slick and mobile handy accessories closer in function to smartphones than laptops. As such, each iPad and iOS update is global news. Improving the vast and spreading App Store, with hundreds of thousands of applications, the iPad tablet PC will continue to lead the tablet market for at least the near future. While features and specific iOS versions can vary by device, the fragmentation concerns that dog Android are a non-issue with the iPad.

webOS tablet PC
Firstly originated on Palm and featured on the well-received Pre smartphone, webOS is now HP’s preferrable tablet PC operating system, and with Synergy technology, is the key to HP’s aim of implementing all of its products, including printers, desktops, and tablet PCs. Like Android and iOS, webOS is open to third party development, and older webOS apps developed for the Palm Pre work in the current webOS.

Blackberry OS tablet PC
RIM created an entirely new operating system for its BlackBerry PlayBook tablet, basing it on the QNX Nuetrino microkernel planning. This means RIM proposes the BlackBerry Tablet OS to be safe and stable, as evident by the fact that QNX OS technology is also found in space stations and in-car systems. RIM has placed the OS and its tablet PC as both operative and fun, achieving high gaming and video performance as well as high-level security and data safety encryption.

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Article by Panos Vog
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