To save the file to your computer, right-click on the link and choose "Save Target As" from the drop-down menu. (Depending on the browser you are using, the menu choice may be different!)

These are compressed Powerpoint files. Once you download them, double-click on the file and you will be presented with an option for where to save the PowerPoint presentation. Click Unzip in the "WinZip Self-Extractor" to save the file.