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Free Viewers and Readers
This page contains links to free viewers and readers available on the Internet. These viewers and readers are necessary to read or print certain documents on the OTAQ Web site.
PDF:
About Portable Document Format (PDF) Files
PowerPoint Viewer: Various
Platforms 
ZIP Files:
Files that have been compressed in ZIP format will need to be unzipped. There are several zip and unzip programs available on the Internet.
- WinZIP
MS-Windows users may want to try WinZip. It's not free, but it has the advantage of being able to handle ZIP and other compressed formats (Gzip and Tar). - Download.com
This Web site has various freeware and shareware for unzipping files, including ZipCentral and WinZip.