The N² Technology ("N²" being short for Non-Nuclear) is a technology seen throughout various Evangelion series in different forms.
N² weapons (N² 兵器, N² heiki) is the name given to the strongest conventional (non-Evangelion) weapons ever created by mankind. N² weapons are as strong as nuclear bombs, even being capable of producing electro-magnetic pulses, but they lack the radioactive fallout generated by their nuclear counterparts, allowing them to be used more readily than their predecessors. They are capable of dealing moderate damage to some of the weaker Angels, as can be seen during Sachiel's attack to Tokyo-3, although even several detonations of N² weapons are incapable of affecting others. It has been said that the N² weapons are broadly similar to a low-yield nuclear warhead, with no apparent fallout.
N² weapons come in five basic forms.
- N² bomb (N²爆弾, bakudan)
- N² depth charge (N²爆雷, N² bakurai)
- N² land mine (N²地雷, N² jirai)
- N² aerial weapon (N²航空兵器, N² koukuu heiki)
- N² missile
N² Reactor is a technology appearing in Neon Genesis EVANGELION (3 Years After) -ANIMA-. It is used on the UX-1 Allegorica support unit and Evangelion EUROII Heurtebize. Its purpose is essentially the same as the S² Engine's one as it grants the Eva unit an unlimited amount of operational time. However, it uses N²-derived technologies to achieve this.
- Although "N²" is always written with a superscript "2", it is not pronounced "N-squared", but simply "N-two".