On my Samsung Galaxy SIII, I am used to controlling which applications are running at any given time by holding the Home hardware button and then swiping any apps I want to close from the list of running apps that shows up. In the following screenshot, I have held down the Home hardware button and closed all running application by tapping the icon that shows up in the lower-right hand side consisting of a list with an X in front of it:
(click the image to see its larger variant)
However, what puzzles me is that no applications are running, therefore shouldn't those icons in the upper-left hand side of the notification bar disappear so as to tell the user that these apps are no longer running? Perhaps I have missed the purpose of those icons in the upper-left hand side of the notification bar.
Perhaps someone could explain what they mean.