Notes:
http://www.crtc.gc.ca/eng/help.htm#read
Viewers for: .PDF, .ZIP, .DOC and .XLS
Advertises Adobe only, rather than multiple PDF viewers: http://www.flora.ca/pdf.shtml
Advertises single ZIP tool, rather than the many that exist.
Advertises http://office.microsoft.com/ which is a Microsoft Office marketing site. With some exploring one may find the Microsoft-platform-only optional viewer.