Computer deskThe most common form of the computer desk is a variant of the ergonomic desk, which has an adjustablekeyboard trayand sufficient desktop space for handwriting. Provisions for a monitor shelf and holes for routing cables are integrated in the design, making it easier to connect the computer components together. The typicalarmoire deskprovides space for akeyboard,mouse,monitor,printerand speakers.Cubicle deskdesigns for business and government workplaces include a range of shelves, trays and cable-routing holes for computer systems. In some computer desks, the cabling is affixed to themodesty panelat the back of the desk, to create a neater appearance.Computer monitorAmonitoror adisplayis anelectronic visual displayforcomputers. The monitor comprises the display device,circuitryand an enclosure. The display device in modern monitors is typically athin film transistor liquid crystal display(TFT-LCD) thin panel, while older monitors used acathode ray tube(CRT) about as deep as the screen size.Originally, computer monitors were used fordata processingwhiletelevision receiverswere used for entertainment. From the 1980s onwards, computers (and their monitors) have been used for both data processing and entertainment, while televisions have implemented some computer functionality. The commonaspect ratioof televisions, and then computer monitors, has also changed from 4:3 to 16:9.Computer CasesThe most common system case type is the tower. Depending on the specific number of internal drive bays and the height of the tower, these cases can be further classified into mini-size, mid-size and full-size tower cases. One of the biggest considerations when choosing between case sizes is the number of slots and the number of devices we would like to add to those cases.WallpaperOn a computer that is provided with adesktopkind ofuser interface, wallpaper is the background pattern or picture against which desktop menus, icons, and other elements are displayed and moved around. A wallpaper image can be in aJPEGor aGIFfile format. Wallpaper is commonly used in MicrosoftWindows,MacintoshMac OS,Linux, and in otheroperating systems as well. Each operating system provides several pre-installed wallpaper images for the user to choose from. A user can also choose to download and install third-party wallpapers and use one of these instead.