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Introduction to Computing - David Evans

The first million years of hominid history produced tools to amplify, and later mechanize, our physical abilities to enable us to move faster, reach higher, and hit harder. We have developed tools that amplify physical force by the trillions and increase the speeds at which we can travel by the thousands.

Computing is the ultimate mental amplifier.

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Windows Desktop

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Objective   10/28/2017

Windows Desktop operation.

Windows shell  10/26/2017

from Wikipedia

The Windows shell is the graphical user interface for the Microsoft Windows operating system. Its readily identifiable elements consists of the desktop, the taskbar, the Start menu, the task switcher and the Autoplay feature. On some versions of Windows, it also includes Flip 3D and the charms. However, the Windows shell also implements a shell namespace that enables computer programs running on Windows to access the computer's resources via the hierarchy of shell objects. "Desktop" is the top object of the hierarchy; below it there are a number of files and folders stored on the disk, as well as a number of special folders whose contents are either virtual or dynamically created. Recycle Bin, Libraries, Control Panel, This PC and Network are examples of such shell objects.

The Windows shell, as it is known today, is an evolution of what began with Windows 95, released in 1995. It is intimately identified with File Explorer, a Windows component that can browse the whole shell namespace.

Desktop  10/26/2017

from Wikipedia    Desktop

Windows Desktop is a full-screen window rendered behind all other windows. It hosts the user's wallpaper and an array of computer icons representing:

Files and folders: Users and software may store computer files and folders on Windows desktop. Naturally, on a newly-installed version of Windows, such items do not exist. Software installers commonly place files known as shortcuts on the desktop, allowing users to launch installed software. Users may store personal documents on the desktop.

Special folders: Apart from ordinary files and folders, special folders (also known as "shell folders") may appear on the desktop. Unlike ordinary folders, special folders do not point to an absolute location on a hard disk drive. Rather, they may open a folder whose location differs from computer to computer (e.g. Documents), a virtual folder whose contents is an aggregate of several folders on disk (e.g. Recycle Bin or Libraries) or a folder window whose content is not files, but rather user interface elements rendered as icons for convenience (e.g. Network). They may even open windows that do not resemble a folder at all (e.g. Control Panel).

Starting with Windows Vista and Windows 7 (and the corresponding versions of Windows Server), Windows Desktop Gadgets may appear on the desktop. These gadgets are discontinued in newer versions of Windows and Windows Server, starting with Windows 8.

Taskbar  10/26/2017

from Wikipedia    Taskbar

Windows taskbar is a toolbar-like element that by default, appears as a horizontal bar at the bottom of the desktop. It may be relocated to the top, left or right edges of the screen. Starting with Windows 98, its size can be changed. The taskbar can be configured to stay on top of all applications or to collapse and hide when it is not used. Depending on the version of operating system installed, the following elements may appear on the taskbar respectively from left to right:

. Start button: Provides access to the Start menu. Removed in Windows 8, in favor of the Start charm (see below), only to be reinstated in Windows 8.1.
. Quick Links menu: Added in Windows 8 and Windows Server 2012. Invoked by right-clicking on the Start button, or pressing ? Win+X.[1] Grants access to several frequently used features of Windows, such as accessing the desktop or File Explorer.[2]
. List of open windows: Along the length of the taskbar, open windows are represented by their corresponding program icons. And once pinned, they will remain even after their respective windows are closed. Until Windows 7, the operating system displayed active windows as depressed buttons in this list. Starting with Windows 7, the icon for each open window is framed by a translucent box, and multiple open windows for the same program can be accessed by clicking the program's icon. However, the taskbar can be changed to function more as it does with older versions of Windows.
. Shortcuts: An update to Windows 95 and Windows NT 4 added a Quick Launch Bar that could hold file shortcuts, similar to the desktop. Windows 7 merged this area into the list of open windows by adding "pinning" and "jump list" features.
. Deskbands: Toolbars provided by Windows or other programs for easier access to that program's functions; for more information, see Taskbar ยง Desktop toolbars
. Notification area: Allows programs to display icons representing their status as well as pop-up notifications associated with those icons. By default, Windows volume control, network status, Action Center, date and time are displayed in this area.
. "Show desktop" button: Allows users to access their desktops. It is added in Windows 7. Not initially visible in Windows 8. Once the mouse cursor is hovered upon for a second, makes all windows transparent as long as the pointer stays over the button, thus showing the desktop without switching to it: this feature requiring Aero. Clicking the button dismisses all open windows and transfers the focus to the desktop. Clicking it again before selecting any other window reverts the action.

Task switching  10/26/2017

from Wikipedia    Task switching

Task switcher is a feature present in Windows 3.0 and all subsequent versions of Windows. It allows a user to cycle through existing application windows by holding down the Alt key and tapping the Tab ? key. Starting with Windows 95, as long as the Alt key is pressed, a list of active windows is displayed, allowing the user to cycle through the list by tapping the Tab ? key. An alternative to this form of switching is using the mouse to click on a visible portion of an inactive window. However, Alt+Tab ? may be used to switch out of a full screen window. This is particularly useful in video games that lock, restrict or alter mouse interactions for the purpose of the game. Starting with Windows Vista, Windows Desktop is included in the list and can be activated this way.

Windows 7 introduced Aero Flip (renamed Windows Flip in Windows 8). When the user holds down the Alt key, Aero Flip causes only the contents of the selected window to be displayed. The remaining windows are replaced with transparent glass-like sheets that give an impression where the inactive window is located.[3]

Windows 8 introduced Metro-style apps, which did not appear when Alt+Tab ? was pressed. (They have to be switched with their own dedicated task switcher, activated through the ? Win+Tab ? combination.) Windows 8.1 extended Alt+Tab ? to manage the Metro-style apps as well.

Windows 10 has a unified task switcher called Task View, which manages not only application windows but virtual desktops as well.[4]

Aero Flip 3D  10/26/2017

from Wikipedia    Aero Flip 3D

Flip 3D is a supplemental task switcher. It was introduced with Windows Vista and removed in Windows 8. It is invoked by holding down the ? Win key and tapping the Tab ? key. As long as the ? Win key remains pressed, Windows displays all application windows, including the Desktop, in an isometric view, diagonally across the screen from the top left corner to the bottom right corner. The active window at the time of pressing the ? Win key is placed in front of the others. This view is maintained while ? Win key is held down. Tab ? and ? Shift+Tab ? cycle through the open windows, so that the user can preview them. When the ? Win key is released, the Flip 3D view is dismissed and the selected window comes to the front and into focus.[5]

Charms  10/26/2017

from Wikipedia    Charms

Windows 8 added a bar containing a set of five shortcuts known as the "charms", invoked by moving the mouse cursor into the top or bottom right-hand corners of the screen, or by swiping from the right edge of a compatible touchpad or touch screen.[6][7][8] This feature was retained in 8.1.

Windows 10 removed the charms and moved the commands associated with them into the system menu of each application.[9] For users with touch screens, swiping from the right of the touch screen now shows Action Center.[10]

Start menu  10/26/2017

from Wikipedia    Start menu

Starting with Windows 95, all versions of Windows feature a form of Start menu, usually by this very same name. Depending on the version of Windows, the menu features the following:

Launching applications: The menu's primary function is to present a list of shortcuts for installed software, allowing users to launch them.

Invoking special folders: Until Windows 8, the Start menu was a mean of invoking special folders such as Computer, Network, Control Panel, etc. In Windows 8 and Windows Server 2012, the only special folder that can be invoked from the Start screen is the desktop. Windows 10 restored this functionality.

Searching: Starting with Windows Vista, searching for installed software, files and folders became a function of the Start menu. Windows 10 ended this tradition by moving the search into taskbar.

Ending the user session: Logging off and shutdown has always been a function of the Start menu. In Windows 8, the shutdown function was moved out of the Start screen, only to be brought back in Windows 8.1 Update (in April 2014) with a sufficiently high screen resolution.

Autoplay  10/26/2017

from Wikipedia    Autoplay

Autoplay is a feature introduced in Windows XP that examines newly inserted removable media for content and displays a dialog containing options related to the type and content of that media. The possible choices are provided by installed software: it is thus not to be confused with the related Autorun feature, configured by a file on the media itself, although Autorun is selectable as an Autoplay option when both are enabled.[verification needed]

Relation with File Explorer  10/26/2017

from Wikipedia

Relation with File Explorer

File Explorer is a Windows component that can browse the shell namespace. In other words, it can browse disks, files and folder as a file manager would, but can also access Control Panel, dial-up network objects, and other elements introduced above. In addition, the explorer.exe executable, which is responsible for launching File Explorer, is also responsible for launching the taskbar, the Start menu and part of the desktop. However, the task switcher, the charms, or Autoplay operate even when all instances of the explorer.exe process are closed, and other computer programs can still access the shell namespace without it.

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