U.S. Geological Survey
Information About Portable Document Format (PDF) Files
To ensure you will be able to see a PDF file in its entirety, please obtain the most recent edition of the free Acrobat Reader from the Adobe* Web site.
HTML, the code used to create web pages, can not maintain all of the formatting and presentation for many documents. In such cases, another process is used to display the document called Portable Document Format (PDF). The PDF process maintains the look and presentation of the original document using a free reader available from Adobe http://www.adobe.com. These PDF files can be viewed across multiple platforms (MAC, PC, UNIX) using the appropriate reader for that platform.
To use a PDF document, a reader program must be installed on your computer to display, print, and navigate. The Adobe* Acrobat* reader is available for downloading at no cost from Adobe's Web site at http://www.adobe.com, or their File Transfer Protocol (FTP) Site at ftp.adobe.com
* Adobe, Acrobat, and Adobe Type Manager are trademarks of Adobe Systems Incorporated and may be registered in certain jurisdictions. © Copyright 1994 Adobe Systems Incorporated. All rights reserved.
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