These devices and programs are responsible for the interior Environmental Metaphor of a TARDIS. These include the Protyon Unit, Relative Dimensional Stabilizers, Time Vector Generator, and Architectural Configuration Program.
The Auto-Systems also ensure that a TARDIS's Reality Quotient remains stable at 0.9 and that the crew members' quotients remain at 1. If displaced from their proper time state the Auto-Systems will attempt to correct the problem, but they will need a Standing Wave (created by a binary induction system) to home in on.
The following color code is used:
- Black: For information from the TV Series, including Dimensions in Time, and 1996 TV Movie.
- Blue: For information from the Novels and Audios including Target, Virgin, BCC, and Big Finish.
- Green: For information from 'licensed' reference sources such as the Technical Manual, Doctor Who Magazine, and the Role Playing Games.
- Red: For information from unofficial sources -The Faction Paradox series, behind the scenes interviews, author's speculation, and popular fan belief.
The TARDIS Technical Index is copyright Will B Swift.