Wallpaper is the pattern presented on monitor or picture or other graphic representation that forms the background onto which all the icons, menus and other elements of the operating system are displayed . An operating system will typically come with pre-installed images to set as the wallpaper.
The wallpaper always stays in the background, and all work is done on top of the wallpaper.
These are some interesting websites on which you can find enormous database of wallpaper, for free download:
walpapers.rs -has everything you need for your desktop.
download.com - look for download of wallpaper software
[go to www.freebiesfreestuff.com]