Windows 7 is available in six main editions: Windows 7 Starter
A budget edition of Windows 7 for casual users and low-powered devices such as netbook computers
Windows 7 Home Basic
A budget edition of Windows 7 for emerging markets Windows 7 Home Premium
An enhanced edition of Windows 7 with premium entertainment features
Windows 7 Professional
A basic edition of Windows 7 for use in small businesses and networks that use Windows domains Windows 7 Enterprise
An enhanced edition of Windows 7 for use in Windows domains with extended management features
Windows 7 Ultimate
An enhanced edition of Windows 7 with all the available home user and professional user features
Only the Professional, Enterprise, and Ultimate editions have the components needed to join a Windows domain. Table 22-1 provides an overview of the differences among these editions. Supported features are marked with a "x." Standard features that all Windows 7 editions support are not listed. Note also that Microsoft may change the included features and I'll try to update the list as appropriate at http://www.williamsta nek.com/windows7/.
Windows 7 feature
Windows 7 edition
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