DESKTOP
background, desktop, screen background
(noun) (computer science) the area of the screen in graphical user interfaces against which icons and windows appear
desktop
(noun) the top of a desk
Source: WordNet® 3.1
Etymology
Noun
desktop (plural desktops)
The top surface of a desk.
(computing) A desktop computer.
(computing, GUI) The main graphical user interface of an operating system, usually displaying icons, windows and background wallpaper.
Adjective
desktop (not comparable)
Designed for use on a desk or similar piece of furniture.
(computing) Of an application, designed to be run on a personal computer.
Source: Wiktionary