Talk:Persistent object identifier

the first link comes back:

https://www.ibm.com/developerworks/error/error-404.html https://en.wikipedia.org/w/index.php?title=Talk:Persistent_Object_Identifier&action=submit# — Preceding unsigned comment added by 216.15.124.242 (talk) 14:45, 18 April 2016 (UTC)