What is the difference between Karate and Tae Kwan Do?

[neoEIN]

Thanks for all the comments and suggestions .
The reason of considering pickin up TKD or K is because I want to make new friends, learn more self-dicipline, and may be learn to become more responsible. I've had taken TKD before and I agree that it was alot of forms which is not useful in self defence.
Unfortunately, others martial art that you folks have recommended are not heard of so chances to take lessons in my city is pretty slim.
I will look into Hapkido (not sure if I spell correctly but it's the one that Steven Siegel plays in the "under siege" movie series) though.