Sort the above devices into the correct categories by dragging them into the correct boxes. Some devices might appear in more than one category. Depending on your browser, you might not see the image move, but it should appear in the box when you let go of the mouse-button. If you change your mind you can drag another image into the same place, or you can right-click/long-tap to return the image to the of the page.
Drag and drop doesn't work on tablets, but you can also click/tap on a picture , and then click/tap where you want it to go.