Microsoft Windows 7 Question:

Answer #1
Each edition of Windows 7 will come with a distinct feature set. As in the past, each successive edition will include the features of the other, typically less expensive, editions.

► Windows 7 Home Premium
►► Broad application and device compatibility with unlimited concurrent applications.
►► Safe, reliable, and supported.
►► Home Group makes it easy to share media, documents, and printers across multiple PCs in offices without a domain.
►► Improved Taskbar and Jump Lists.
►► Live thumbnail previews and an enhanced visual experience.
►► Advanced networking support (ad hoc wireless networks and Internet connection sharing).
►► Mobility Center.
►► Windows Aero transparent glass design and advanced Windows navigation.
►► Easy networking and sharing across all your PCs and devices.
►► Improved media format support, enhancements to Windows Media Center and media streaming, including Play To.
►► Multitouch and improved handwriting recognition.

Answer #2
► Windows 7 Professional
►► Broad application and device compatibility with unlimited concurrent applications.
►► Safe, reliable, and supported.
►► Home Group makes it easy to share media, documents, and printers across multiple PCs in offices without a domain.
►► Improved Taskbar and Jump Lists.
►► Live thumbnail previews and an enhanced visual experience.
►► Advanced networking support (ad hoc wireless networks and Internet connection sharing).
►► Mobility Center.
►► Aero transparent glass design and advanced Windows navigation.
►► Easy networking and sharing across all your PCs and devices.
►► Improved media format support, enhancements to Windows Media Center and media streaming, including Play To.
►► Multitouch and improved handwriting recognition.
►► Domain Join enables simple and secure server networking.
►► Encrypting File System protects data with advanced network backup.
►► Location Aware Printing helps find the right printer when moving between the office and home.
►► Windows XP Mode enables customers to run many Windows XP productivity applications.

Answer #3
► Windows 7 Ultimate and Enterprise
►► Broad application and device compatibility with unlimited concurrent applications.
►► Safe, reliable, and supported.
►► Home Group makes it easy to share media, documents, and printers across multiple PCs in offices without a domain.
►► Improved Taskbar and Jump Lists.
►► Live thumbnail previews and an enhanced visual experience.
►► Advanced networking support (ad hoc wireless networks and Internet connection sharing).
►► Mobility Center.
►► Aero transparent glass design and advanced Windows navigation.
►► Easy networking and sharing across all your PCs and devices.
►► Improved media format support, enhancements to Windows Media Center and media streaming, including Play To.
►► Multitouch and improved handwriting recognition.
►► Domain Join enables simple and secure server networking.
►► Encrypting File System protects data with advanced network backup.
►► Location Aware Printing helps find the right printer when moving between the office and home.
►► Windows XP Mode enables customers to run many Windows XP productivity applications.
►► BitLocker protects data on removable devices.
►► DirectAccess links users to corporate resources from the road without a virtual private network (VPN).
►► BranchCache makes if faster to open files and Web pages from a branch office.
►► AppLocker easily restricts unauthorized software and enables greater security.