The four rings stand for the four companies that merged together to make current Audi. They were Audi, DKW, Horch and Wanderer.
The Audi logo is four rings.
Four
It is Audi.
Audi
TNT (A mail service provider in the Netherlands
Audi car is the car which is manufacturered features a car logo that has four interlocking rings. In addition, Audi car is served in all over the world.
AUDI
Audi
Audi
the six continents
it means that the four circles signnify four wheel drive
the rings in the olympics logo are yellow, green, blue and black because at least one of those colors are on every flag in the whole world.