Below is a list of file formats we are currently using on this site, along with links to download the appropriate viewers/plug-ins.
Adobe Acrobat (PDF) Files
Description: Adobe Reader is a program that allows users to view files in Portable Document Format (PDF). PDF is a universal file format that preserves the appearance of the original document. PDF files can be easily printed but not easily modified. Many documents throughout this web site are available in PDF. The creator of this file format, Adobe® Systems, offers a free viewer so that you can view any PDF file.
File extensions: .pdf
Viewing: If you do not already have Adobe Acrobat or Reader, you can download Adobe Reader for free. 
Microsoft Word Files
Description: Microsoft Word is a word processing software program used to create and edit text documents.
File extensions: .doc, ,docx, .rtf
Viewing: If you do not already have Word you can download Word Viewer for free.
Microsoft PowerPoint Files
Description: Microsoft PowerPoint is a software program used to create and edit slide presentations.
File extensions: .ppt, .pptx
Viewing: If you do not already have PowerPoint you can download PowerPoint Viewer for free.
Microsoft Excel Files
Description: Microsoft Excel is a spreadsheet program used to calculate, analyze, and store data. Text in Excel files can be easily modifed or copied for use in other applications.
File extensions: .xls, .xlsx
Viewing: If you do not already have Excel, you can download Excel Viewer for free.
Audio/Video Files
Description: Audio and video files used on this site are commonly formatted at MP3, MP4, or WMV files. These audio and video files and others such as MPEG, AVI, and WAV) are identified as Media format or use the generic audio/video icon.
File extensions: .avi (audio), .mp3 (audio), .mpeg (video), .wmv (video), .mpg (video), .mp4 (video)
Compressed Files
Description: WinZip and similar programs (PowerZip, TurboZip, ZipScan, WinConfig, and StuffIt, etc.) are used to archive and compress files so that they can be stored and distributed more efficiently.
File extensions: .zip
Viewing: If you do not already have a compression program such as WinZip, you can download a free trial version of WinZip or download similar compression program.