The user interface interprets the command and passes the program name to the file system, which reads the directory.
When a Mac is turned on the Finder program is automatically launched and it provides the desktop.
Finder.
finder
The "Windows Explorer " program is launched.
Windows desktop and The Recovery Console
Innumerable. Remember that any program on Linux can be launched from the command line, so there are as many commands as there are programs.
how do you open a program located on your desktop
The Finder is the program that is automatically launched when a Mac is turned on.
The Etruscans launched a building program that turned it into a city.
If something get "stuck" or display wrong on your desktop as often if a program stops working you can refresh your desktop. It will re-draw everything on your screen removing anything visual that shouldn't be there.
headlines
The small picture on the computer desktop that can be clicked to invoke a command or program is called an icon. It is also referred to as a shortcut or a link.