itop (艾拓）最终用户文档
http://www.itilxf.com/thread-36546-1-1.html
ITIL论坛
http://www.itilxf.com/forum.php?gid=1
itop中文
https://github.com/purplegrape/iTop-CN
https://www.jianshu.com/p/94a115746514
https://blog.csdn.net/watermelonbig/article/details/49563491
https://blog.csdn.net/openbox2008/article/details/79985409
https://github.com/Combodo/iTop