Whatever page you are on in this website, you will always see which of these sections it belongs to. The only exception to this are the section pages themselves. Use your right mouse button to bring up pages in a new window - If you want to follow a link given on one of our pages, but you want to keep your place, try pressing your right mouse button, when your cursor is over the link. A new browser window will pop up with the linked page in it. To return to your original page, simply close the new window.
More advanced users can switch between windows.
Some sites actually force a pop up window to open when you click on a link, but we believe that you are quite capable of making the decision on how you navigate on the web.