dveykus: not that easy, though, no? Especially as the point in training in something is to get a job as soon as possible afterward, so training in more than one thing with the plan of only working on one field would seem to be wasted time.
What might make sense, if you’re planning on doing something with a master’s or higher, is to major in something that will give you the prereqs for several relevant fields in case you want to change career paths later on…