Operating systems and vendors
Tablet PC operating systems
Tablets, like regular computers, can run a number of operating systems. These come in two classes, namely desktop-based operating systems and mobile-based ("phone-like") operating systems.
For the former class popular OS's are Microsoft Windows, and a range of Linux distributions. HP is developing enterprise-level tablets under Windows and consumer-oriented tablets under webOS. In the latter class the popular variants include Apple iOS, and Google Android. Manufacturers are also testing the market for products with Windows CE, Chrome OS,and so forth.
Boot times for iPads are one-half the boot times for current Windows 7 netbooks, which can take over 50 seconds to display the login prompt.The BIOS initialization for a PC, which has remained unchanged since the invention of the PC, can still take 25 seconds.
Tablet PC operating systems
Microsoft
Following Windows for Pen Computing, Microsoft has been developing support for tablets runnings Windows under the Microsoft Tablet PC name.According to a 2001 Microsoft definition of the term, "Microsoft Tablet PCs" are pen-based, fully functional x86 PCs with handwriting and voice recognition functionality. Tablet PCs use the same hardware as normal laptops but add support for pen input. For specialized support for pen input, Microsoft released Windows XP Tablet PC Edition. Today there is no tablet specific version of Windows but instead support is built in to both Home and Business versions of Windows Vista and Windows 7. Tablets running Windows get the added functionality of using the touchscreen for mouse input, hand writing recognition, and gesture support. Following Tablet PC, Microsoft announced the UMPC initiative in 2006 which brought Windows tablets to a smaller, touch-centric form factor. This was relaunched in 2010 as Slate PC, to promote tablets running Windows 7, ahead of Apple's iPad launch.Slate PCs are expected to benefit from mobile hardware advances derived from the success of the netbooks.
While many tablet manufacturers are moving to the ARM architecture with lighter operating systems, Microsoft has stood firm to Windows.Though Microsoft has Windows CE for ARM support it has kept its target market for the smartphone industry with Windows Mobile and the new Windows CE 6 based Windows Phone 7. Some manufacturers, however, still have shown prototypes of Windows CE-based tablets running a custom shell. To date, the full Windows 7 does not yet support ARM architecture.
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