The Type 39 was the first model of TARDIS whose Protyon Core manifested semi-sentience. The idea of a TARDIS acting on its own initiative took the Time Lords a while to believe and then even longer to accept. Many Capsules were sent for repairs or even de-energized for their disobedience.
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.