Nerv
NERV (German: nerve) is a special agency nominally under the control of the United Nations, led by Commander Gendo Ikari, tasked with defending humanity from the Angels using the Evangelions, which it was tasked with constructing. Originally, NERV was known as GEHIRN, but after its main Tokyo-3 base and the MAGI supercomputers were completed, it was renamed and reorganized into "NERV" in 2010.
There are several global branches of NERV besides the main NERV HQ base built underneath Tokyo-3, such as NERV-01, NERV-02, and NERV-03.