&gt; But funny thing, I bought some reference books for one of my teams recently and had to teach a couple of them how to use an index because they had only learned to ctrl+f to find things.<p>That&#x27;s unsettling. Were they college educated? I assume that they are but I can&#x27;t fathom how you can get a college degree and not know how to use an index.<p>For reference books I find myself preferring PDFs because of the fixed layout.