Most word processors understand rich text format, so it can be a good portable format to use if you want people to read it from their word processors. It has a minimal markup set and uses multiple carriage returns and line feeds as separators. Although a fairly common format, JPEG is not supported internally by as many browsers as GIF is. Because it is simple and because most graphical browsers support it, it can be useful for creating small, dynamic images such as counters. Generally, X bitmap files have the extension .xbm.
Filenames usually end with the extension .au.
Filenames usually end with the extension .avi. Any general, binary format that the server doesn't recognize usually uses this MIME type. Upon receiving this type, most browsers give you the option of saving the data to a file. You can use this MIME type to force a user's browser to download and save a file rather than display it. The Zip compression format.