<a href="https:&#x2F;&#x2F;tools.ietf.org&#x2F;search&#x2F;rfc1436" rel="nofollow">https:&#x2F;&#x2F;tools.ietf.org&#x2F;search&#x2F;rfc1436</a><p>They may not quite suit the modern world very well, but I like protocols that I can use via telnet&#x2F;nc<p><pre><code>   nc gopher.metafilter.com 70
   &lt;hit enter&gt;</code></pre>