- First to have a hexagonal free-standing Master Control Console inside the control room.
- First with Rassilon Imprimature enhanced with Telepathic Circuits
- First to have Architectural Configuration Program
- First to have modern Main Door Locking Mechanism
- First to have Isomorphic Security System
- Enhanced Temporal Limiter
- Despite increased security, several Type 20s were captured by the Ooolatrii during the Celestial Wars.
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.