Zip files are a space-saving way of storing single files or groups of related files. If you are using Windows XP or later, then you can easily open zipped files. On your computer zipped files are described as "Compressed (zipped) folders." If you are using Windows 95, Windows 98, Windows ME, Windows NT or Windows 2000 then you will need to install a program to open zip files. A popular archiving application is WinZip which can be downloaded from this link: http://www.winzip.com/downwz.htm.