Possessing super-advanced technology, it was the one responsible for the development and possession of the Evangelion units.  Their base is located underground and is called the Geo-Front. 

Their supreme commander is Gendo Ikari. 

NERV was originally formed as the Geihrin Project in 2003 AD, but was later dissolved by Chairman Keel Lorenz and the organization known as NERV was born in 2010 AD.

And then the picture is a half piece of fig leaf. The fig leaf, according to legend, is the symbol of  the original sin which entangled Adam and Eve. It reminds us of the human who ate the Fruit of Wisdom.