Thanks for answers to everyone.

My background - mathematics. Here in Russia we have weird majors; for example my called "Mathematics and Computer science". The last one was always (except last few years)was connected to something - to Mathematics, to Biology or to Cybernetics. I was graduated with honors, my GPA is 3.86 (of 4.0), my thesis work was (could be not 100% well translated) "fuzzy logic expert systems and their usage in educational tests".

I understand that science work is more with theories than my real work, but, anyway, I want to do programming... I want to use Perl in my work.... My problem - I want to do everything =) I like many directions of research that offered =) And I don't know how to choose =(

Again, thanks for your comments guys. I'll try to review researches of faculty professors at universities, and mail to some of them.