Lots of laptops during exam week

When we interviewed students a year ago, we found that very few of them brought their laptops to the library. It's exam period now, and almost every table of students has at least one laptop. In fact, I walked by a table with four students, and four laptops. They have even started to plug in their laptops at the same table with the library computers. I think I understand what's different - they bring their laptops to the library during *exam* week, because they don't have classes all day. Ah so!