After you given GRE exam and when you saw a scores on the screen, there is an option for you to report the scores to the 4 universities for free. You can select the university by choosing state (it displays a universities in that state) or if you know the code of that university, you can directly chose that university and at the same time you've to choose the department ( your respected aim branch ). Even If you didn't choose the department, no problem just keep that as 'not decided' option. University people will proceed based on your application. If you've any doubt on that time, you can ask the guys who are supervising your exam by raising your hand.
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