Neural interface

A neural interface is a device which allows a user to control a device with their mind. Most usually have some sort of DNA lock to them.

Ancients
Much the most dangerous technology used by the Ancients was keyed to link to the nervous system and the technology being used. To access the devices, the user needed the ATA gene, which would initialize the device. Most of the Tau'ri who possess the ATA gene require serious concentration, though Jack O'Neill and John Sheppard have been able to activate Ancient technology with ease.

Goa'uld
A great deal of the technology used the Goa'uld can only be activated with their minds, such as the hand device and the. To activate it, the user must have naquadah within their bloodstream. Thus, only hosts and former hosts are able to activate Goa'uld technology. However, most lack the proper mental training to achieve this.

Ori
The warships of the Ori are keyed to Priors who control the vessel from a small bridge. The systems cannot be initialized without it. However, Adria was able to activate the systems from a different room.

Wraith
Wraith hive ships must be piloted by a Wraith neural interface, similar to the Ancient gene. Those who have Wraith DNA in their systems are capable of piloting the vessel, but it is taxing on the person.