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Thursday 17 October 2013

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Desktop Wallpaper Download Definition

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On a system that offers a desktop environment, a window manager in conjunction with applications written using a widget toolkit are generally responsible for most of what the user sees. The window manager supports the user interactions with the environment, while the toolkit provides developers a software library for applications with a unified look and behavior.

A windowing system of some sort generally interfaces directly with the underlying operating system and libraries. This provides support for graphical hardware, pointing devices, and keyboards. The window manager generally runs on top of this windowing system. While the windowing system may provide some window management functionality, this functionality is still considered to be part of the window manager, which simply happens to have been provided by the windowing system.

Applications that are created with a particular window manager in mind usually make use of a windowing toolkit, generally provided with the operating system or window manager. A windowing toolkit gives applications access to widgets that allow the user to interact graphically with the application in a consistent way.

History and common use

Further information: History of the graphical user interface

The first desktop environment was by Xerox and was sold with the Xerox Alto in the 1970s. The Alto was generally considered by Xerox to be a personal office computer; it failed in the marketplace because of poor marketing and a very high price tagWith the Lisa, Apple introduced a desktop environment on an affordable personal computer, which also failed in the market.

On commercial personal computers the desktop metaphor was popularized among technical users by the original Macintosh from Apple in 1984, and among the general population by Windows 95 from Microsoft in 1995. As of 2011 the most popular desktop environments are their updated versions in Windows XP and Windows 7, followed by the desktop environment of Mac OS X. When compared with desktop environments for Linux, the ones included with these operating systems are relatively unalterable.

Although, with the exception of Macs, which are shipped with Mac OS X, personal computers using Linux and other Unix-like OSs are still much less common, in recent years there has been a growing market for low cost Linux PCs that use the X Window System. These machines support many X11-based desktop environments.

In graphical computing, a desktop environment (DE) is an implementation of a desktop metaphor graphical user interface (GUI). The desktop environment was seen on most personal computers until the rise of mobile computing. Desktop GUIs help the user in easily accessing, configuring and modifying many important and frequently accessed specific operating system (OS) features. The GUI usually does not afford access to all the many features found in an OS. Instead, the traditional command-line interface (CLI) is still used when full control over the OS is required in such cases.

A desktop environment typically consists of icons, windows, toolbars, folders, wallpapers and desktop widgets (see Elements of graphical user interfaces and WIMP).

A GUI might also provide drag and drop functionality and other features that make the desktop metaphor more complete. A desktop environment aims to be an intuitive way for the user to interact with the computer using concepts which are similar to those used when interacting with the physical world, such as buttons and windows.

While the term desktop environment originally described a style of user interfaces following the desktop metaphor, it has also come to describe the programs that realize the metaphor itself. This usage has been popularized by the Common Desktop Environment and the K Desktop Environment.

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