ferbctg said:
How many types of Blackjack al over the world? I really consider this topic for my thesis in University. Thank for help!
When you said Blackjack and only BJ there are 3. There is the American BJ which is played in the US and European BJ which is played by everybody else in the world except in Australia. The Australian version is in between the two.
Variations of BJ are numerous like Spanish 21, Pontoon and many others. New variations crop up on an ongoing basis.
Your best reference for your thesis can be found in this website
http://www.wizardofodds.com. and don't forget to look in the Q & A section which covers just about everything in the BJ universe.