PHYSICS 137

        To enable us to identify you on postings of scores, class rankings and grades (and if you desire, on submitted work), in conformity with federal privacy laws, we ask that you assign yourself a confidential four-digit identification number (CID#).  (If you fail to do so, your scores will still be known to your instructor but will not appear on posted lists.)  If more than one student selects the same CID#, that number will be assigned to the first person making the selection.  Later selectors will be invited to choose different numbers.