Desktop Environment VS Window Manager, what is the difference?

I was wondering about the difference between DE and WM?
It is just like iconize VS minimize or directory VS folder?
So it is the same just more Unix-like or more Windows-like?
Or there is a difference?

Strictly speaking, a window manager is in charge of managing windows. It draws the decorations (usually just the title bar and borders) and places each window onscreen. It's also in charge of moving and resizing windows. If you run X without a window manager, each window opens, without a border, in the top-left corner of the screen (you can usually use the -geom or --geometry option to pick a default position when running an app), and you can't move or resize them. (Examples: Xmonad, evilwm, Metacity)
Many window managers offer a built-in application launcher, usually by showing a menu when you right-click on the desktop. I prefer to call this a "desktop shell", what Enlightenment calls itself, because it does more than manage windows but is still a single program. (Examples: Fluxbox, Openbox, Window Maker)
A desktop environment is a collection of programs and libraries designed to create an integrated environment. It almost always includes a window manager, with the notable exception of the RoX desktop. The individual parts of a DE can be swapped out if you prefer another program. For example, before XFCE included Thunar, I ran it with Openbox as a WM and RoX as a file manager. (Examples: KDE, XFCE, Étoilé)

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