Also of interest
If is it unclear to which category a document belongs, use the search.
Help with downloading certain files
Certain files, such as PowerPoint presentations or Excel spreadsheet files, may not download as expected after clicking the file link. If you have trouble downloading a file to your computer, try a right-click or click-&-hold on the link to reveal your browser’s popup menu to “Save target as...” or “Download...” the file.
Some files on this site are tens of megabytes in size. They may take a long time to download (e.g. A 20 MB file may take over an hour to download via modem).