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In addition to standard HTML Web pages, our Web sites contain other file formats. You may need additional software or browser plug-ins to view some of the information available on our sites. The following lists show each format, along with links to the corresponding freely available plug-ins or viewers.


Adobe Acrobat ReaderAdobe Acrobat Reader (.pdf)
If you do not already have Adobe Acrobat, you can download Acrobat Reader for free* (Windows and Macintosh).

Microsoft WordMicrosoft Word and Corel WordPerfectCorel WordPerfect (.doc, .wpd)
If you do not already have Microsoft Word or Corel WordPerfect, you can download Word Viewer 2003 for free* (Windows).

Microsoft ExcelMicrosoft Excel (.xls)
If you do not already have Microsoft Excel, you can download Excel Viewer 2003 for free* (Windows).

Microsoft PowerPointMicrosoft PowerPoint (.ppt)
If you do not already have Microsoft PowerPoint, you can download PowerPoint Viewer 2003 for free* (Windows).


Microsoft Windows Media PlayerMicrosoft Windows Media Player (.wmv, .avi, .mpg, .mpeg, .mp3, .mp4, .m4v, .m4a)
If you do not already have Windows Media, you can download Windows Media Player or Windows Media Components for Macintosh for free:

Apple QuickTimeApple QuickTime (.mov, .mpg, .mpeg, .aif, .mp3, .m4p, .m4v, .m4a)
If you do not already have QuickTime, you can download QuickTime Player for free* (Windows and Macintosh).

RealPlayerRealPlayer (.ra, .rm, .ram)
If you do not already have RealPlayer, you can download RealPlayer for free:

Adobe Flash PlayerAdobe Flash Player (.swf)
If you do not already have Adobe Flash, you can download Adobe Flash Player for free* (Windows and Macintosh).

Compressed Files

Zip Compressed FilesZip Compressed Files
Windows XP and Windows Vista have a zip compression utility built into the operating system. If you are using a Macintosh or running an older Windows operating system and do not already have a compression program such as WinZip, you can download a free 21-day trial version of WinZip* (Windows) or download a similar compression program:

* The NCI Web site provides links to other Internet sites for informational purposes and the convenience of its users. When users select a link to an external Web site, they are leaving the NCI Web site and are subject to the privacy and security policies of the owners/sponsors of the external site.

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