How to take a screen shot in OS X

I can never remember so I'm finally writing a post about it. Here are the key combos for taking screen shots in OS X.

-  Command-Shift-3: Take a screenshot of the screen, and save it as a file on the desktop
-  Command-Shift-4, then select an area: Take a screenshot of an area and save it as a file on the desktop
-  Command-Shift-4, then space, then click a window: Take a screenshot of a window and save it as a file on the desktop
-  Command-Control-Shift-3: Take a screenshot of the screen, and save it to the clipboard
-  Command-Control-Shift-4, then select an area: Take a screenshot of an area and save it to the clipboard
-  Command-Control-Shift-4, then space, then click a window: Take a screenshot of a window and save it to the clipboard


This was taken word for word from here.