
Excerpt:
The logo is the most important part of the Tao brand identity. It is formed by combining the double ring symbol with the Tao name style.This name style has been created to be highly legible and to reflect a modern, high-tech organisation.
Visual consistency is paramount, therefore the logo must not be adjusted, redrawn or modified in any way.
The logo should always be implemented from approved sources. Digital logo artwork on disc and conventional logo artwork for photographic copying or scanning are available.

Source:
Tao - Brand Guidelines (Graphic Standards) [PDF]