If you can't personally see Microsoft co-founder Bill Gates give a commencement speech, you can check out the advice he dispensed in a series of tweets aimed at incoming freshmen Monday. The philanthropist revealed the fields he would study if he was enrolling in college now. "AI [artificial intelligence], energy and biosciences are promising fields where you can make a huge impact. It's what I would do if starting out today," Gates said. Read: What Will War Look Like In The Future? Terrorists Could Kill Millions With Biological Weapons, Bill Gates Warns Artificial intelligence is not a surpise since Gates has previously has talked about AI, especially robots.