Windows 8 Will Come in Four Versions

Finally! After years of confusing consumers with multiple, slightly different versions of the same operating system, Microsoft announced today that Windows 8 will come in only four versions: One for home use, one for business, one for devices running ARM chips, and one for large enterprises that buy in bulk.
For most people buying an operating system for a traditional desktop or laptop, the choice will be between just two versions. The version called simply "Windows 8" is designed for home users. "Windows 8 Pro" is for business users and includes features for encrypting a file system, virtualization, and domain management.

"Windows RT" is the new name for what had been called Windows on ARM. You won't be able to purchase it on its own; it'll come preinstalled on PCs and tablets that run ARM processors. Windows RT won't be able to run traditional X86/64 desktop software. Instead, it'll run touch-oriented apps based on Windows Runtime (or WinRT), Microsoft's programming model for mobile apps. Apps for the touch-oriented Metro interface are built using Windows Runtime.

Windows RT will come with special touch-oriented versions of Microsoft Word, Excel, PowerPoint, and OneNote.

Windows 8: Key Features by Version

Feature name	Windows 8	Windows 8 Pro	Windows RT
Upgrades from Windows 7 Starter, Home Basic, Home Premium	x	x
Upgrades from Windows 7 Professional, Ultimate		x
Start screen, Semantic Zoom, Live Tiles	x	x	x
Windows Store	x	x	x
Apps (Mail, Calendar, People, Messaging, Photos, SkyDrive, Reader, Music, Video)	x	x	x
Microsoft Office (Word, Excel, PowerPoint, OneNote)			x
Internet Explorer 10	x	x	x
Device encryption			x
Connected standby	x	x	x
Microsoft account	x	x	x
Desktop	x	x	x
Installation of x86/64 and desktop software	x	x
Updated Windows Explorer	x	x	x
Windows Defender	x	x	x
SmartScreen	x	x	x
Windows Update	x	x	x
Enhanced Task Manager	x	x	x
Switch languages on the fly (Language Packs)	x	x	x
Better multiple monitor support	x	x	x
Storage Spaces	x	x
Windows Media Player	x	x
Exchange ActiveSync	x	x	x
File history	x	x	x
ISO / VHD mount	x	x	x
Mobile broadband features	x	x	x
Picture password	x	x	x
Play To	x	x	x
Remote Desktop (client)	x	x	x
Reset and refresh your PC	x	x	x
Snap	x	x	x
Touch and Thumb keyboard	x	x	x
Trusted boot	x	x	x
VPN client	x	x	x
BitLocker and BitLocker To Go		x
Boot from VHD		x
Client Hyper-V		x
Domain Join		x
Encrypting File System		x
Group Policy		x
Remote Desktop (host)		x

(This is not a comprehensive list of all Windows 8 features.)

Source : http://www.pcworld.com

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