FullDive

The use of technology to fully immerse one's conscience in virtual reality. Developed by Kayaba Akihiko it led to the creation of the device called Nerve Gear. It is the basis of most of the stories in the series.

Known VR Technologies

 * Nerve Gear (a.k.a. NERve Direct Linkage Environment System)
 * AmuSphere
 * Medicuboid
 * Soul Translator

Nerve Gear
Nerve Gear (ナーヴギア) completely controls player's consciousness. It has its own battery source, as well as a high electromagnetic microwaves. Nerve Gear was created by Argus. This design trapped 1000 players during the official launch of Sword Art Online.

AmuSphere
AmuSphere (アミュスフィア) is the revised version which has been made safe by [http://swordartonline.wikia.com/wiki/RECTO_Progress_Inc. RECTO Progress Inc.].

Medicuboid
Medicuboid (メディキュボイド) is Amusphere. However, this helmet is used specifically for medical purposes.

Beyond
During the Alicization arc, a new technology is hinted at, where the mind is accelerated to x times the norm giving the person the ability to perform processing x times faster in less time.

Usage
To use Nerve Gear and AmuSphere, the player places the game console over the head. Then, the player will lay down in a comfortable position. After, the helmet-like game will activate through the words "Link Start".