What are the differences between the new editions of Windows 7?

• Windows 7 Ultimate and Enterprise
  Windows 7 Ultimate and Windows 7 Enterprise are the most complete editions of Windows 7. Both versions offer everything that Windows 7 Pro does, plus multi-language packs (so your computer can work in the language of your choice and switch between any of 35 languages) and Microsoft encryption software (BitLocker). Most users probably do not need these advanced capabilities. Enterprise is only for faculty and staff computers purchased with University monies through licensing arrangements, and is not available for student purchase. Enterprise should never be installed on any personally owned computer.
• Windows 7 Pro
  Most Windows users at Princeton will find Windows 7 Pro the version to meet their needs. This edition is full-featured in terms of graphic, media, and entertainment features, and users who work extensively with visual media (e.g. photographic and video) and/or currently use the Windows Media Center edition, will find the features of the Pro edition useful or required. Windows 7 Pro also includes networking, security, and functionality and is designed for the office environment; in fact this version was designed to meet the needs of a small business. Faculty, staff, and students who do not purchase a computer through the University should consider this the recommended operating system required and the recommended version for purchase.
• Windows 7 Home Premium
  Windows 7 Home Premium is targeted for use on computers for your home. The Home edition will not support full integration with all campus computing services. If you are planning on purchasing a new computer for home use, it is recommended that, at the minimum, you purchase Home Premium. If you are an Exchange user, you should purchase Windows 7 Pro.