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Windows Server 2008 R2 is a server operating system produced by Microsoft. It was released to manufacturing (RTM) on July 22, 2009 and launched on October 22, 2009. According to the Windows Server Team blog, the retail availability was September 14, 2009. It is built on Windows NT 6.1, the same kernel used with the client-oriented Windows 7. It is the first 64-bit-only operating system released from Microsoft. Version enhancements include new functionality for Active Directory, new virtualization and management features, version 7.5 of Microsoft IIS Web Server and support for up to 256 logical processors. There are seven editions: Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Windows Storage Server 2008 R2 (Essentials Edition). ==History== Microsoft introduced Windows Server 2008 R2 at the 2008 Professional Developers Conference as the server variant of Windows 7. On January 7, 2009, a beta release of Windows Server 2008 R2 was made available to subscribers of Microsoft's TechNet and MSDN programs, as well as those participating in the Microsoft Connect program for Windows 7. Two days later, the beta was released to the public via the Microsoft Download Center.〔(【引用サイトリンク】title=Windows 7 public beta is available now )〕 On April 30, 2009, the release candidate was made available to subscribers of Microsoft's TechNet and MSDN.〔(【引用サイトリンク】Announcing Windows Server 2008 R2 Release Candidate (RC) )〕 On May 5, 2009, the release candidate was made available to the general public via the Microsoft download center.〔(【引用サイトリンク】Download Windows Server 2008 R2 RC .iso images (May2009) )〕 According to Windows Server Division WebLog,〔(【引用サイトリンク】Windows Server Division WebLog )〕 the following are the dates of the year 2009 when Microsoft Windows Server 2008 R2 has been made available to various distribution channels: * OEMs received Windows Server 2008 R2 RTM in English and all Language Packs on July 29. The remaining languages were available around August 11. * ISV (Independent software vendor) and IHV (Independent hardware vendor) partners have been able to download Windows Server 2008 R2 RTM from MSDN starting on August 14. * IT Professionals with TechNet Subscriptions were able to download Windows Server 2008 R2 RTM and obtain product keys for in English, French, German, Italian, and Spanish beginning August 14 and all remaining languages beginning August 21. * Developers with MSDN Subscriptions have been able to download and obtain product keys for Windows Server 2008 R2 RTM in English, French, German, Italian, and Spanish starting August 14 and all remaining languages starting August 21. * Microsoft Partner Program Gold/Certified Members were able to download Windows Server 2008 R2 RTM through the Microsoft Partner Program (MPP) Portal on August 19. * Volume License (VL) customers with an existing Software Assurance (SA) license were able to download Windows Server 2008 R2 RTM on August 19 via the Volume License Service Center (VLSC). * Volume License customers without a Software Assurance (SA) license were able to purchase Windows Server 2008 R2 through Volume Licensing by September 1. Additionally, qualifying students have been able to download Windows Server 2008 R2 RTM Standard Edition in 15 languages from DreamSpark.〔(【引用サイトリンク】Windows Server 2008 R2 on DreamSpark )〕 Microsoft has announced that Server 2008 R2 will be the last version of Windows supporting the Itanium architecture. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Windows Server 2008 R2」の詳細全文を読む スポンサード リンク
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