Psyche
From Serial Experiments Lain wiki
Psyche is an add-on chip which enhances the power of normal NAVI computers, especially the newer models. This chip is not readily available to the public. It is believed to have come from Taiwan. It may have originated from the Knights of the Eastern Calculus. Using the psyche chip, one can connect to the Wired without the use of devices such as keyboards and mice or even voice control. Instead, it allows "full motion and full range".
Source: [1]