Multimedia on the Web Web Pages contains different multimedia elements, to identify the format or the type of the element an extension is added to the name of the file:  Text: Most common formats are.txt,.doc,.pdf and.htm (or.html)  Graphics: Most common are.gif.jpg  Sounds:.ram,.rm,.wav,.mp3  Video:.avi,.mov,.mpg  Compressed files:.zip (Windows),.sit (Macintosh)