<p>In Penn’s College of Arts and Sciences, you don’t HAVE a major until you formally declare it by the end of your sophomore year. The intended major(s) you list on your application–assuming you don’t just list “undecided”–are merely advisory for the Admissions Office (so they don’t admit a class that’s, e.g., full of just English majors), but basically has no impact on the major you actually declare at the end of sophomore year. E.g., you won’t be asked why you’re declaring a History major at the end of sophomore year, if you had stated on your application that your intended major was Chemistry. At that point, nobody cares what you stated on your application. :)</p>
<p>So yes, Penn DEFINITELY allows–and indeed encourages–the exploration of majors during the first two years. </p>