Went to take iBT

I took a TOEFL exam today. It is one of the requirements to go to a graduate school. TOEFL has been through several changes. The oldest style is on paper, called paper-based TOEFL. Then a new one created, Computer-Based TOEFL, CBT. Now even newer one is popular that is internet Based TOEFT, iBT. I do not know why it is written iBT, not IBT. Seven years ago I took CBT and got 550 which was the requirement to be selected as an exchange student. This time, 550 is the required score but TOEFL score is only valid for two years. That is why I had to take one. The result will be informed in 15 business days which is almost three weeks from now. I hope it will turn out to be good.