From: https://stackoverflow.com/questions/8292217/why-fork-works-the-way-it-does
---------------------------------
From: https://stackoverflow.com/questions/8292217/why-fork-works-the-way-it-does
---------------------------------
From: http://railsfun.tw/t/method-block-yield-proc-lambda/110
-------------------------------------------------------
From: http://highscalability.com/blog/2009/8/6/an-unorthodox-approach-to-database-design-the-coming-of-the.html
-----------------------------------------------------------------------
From: https://blog.ionelmc.ro/2015/02/09/understanding-python-metaclasses/
----------------------------------------------
From: http://www.ocert.org/advisories/ocert-2011-003.html
----------------------------------------------------------------------
From: http://antrash.pixnet.net/blog/post/70456505-stack...
------------------------------------------------------------------------------------
From: http://www.grauw.nl/blog/entry/510
-------------------------------------------------
From : http://en.wikipedia.org/wiki/URI_scheme
---------------------------------------------
From: http://blog.4psa.com/url-urn-uri-iri-why-so-many/
-------------------------------------------------