The AXD301 switch<p>&gt; <a href="http:&#x2F;&#x2F;ll2.ai.mit.edu&#x2F;talks&#x2F;armstrong.pdf" rel="nofollow">http:&#x2F;&#x2F;ll2.ai.mit.edu&#x2F;talks&#x2F;armstrong.pdf</a> (from slide 27 on)<p>&gt; <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Erlang_(programming_language)#History" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Erlang_(programming_language)#...</a><p>&quot;In 1998 Ericsson announced the AXD301 switch, containing over a million lines of Erlang and reported to achieve a high availability of nine &quot;9&quot;s.&quot;<p>Additionally it is well-known that the AXD301 has live patching capabilities (which is not surprising, since Erlang has).