I feel like the more I use it, the more compartments I find. There are so many little touches that make this the best backpack I've used, it's hard to describe. It easily handles a laptop, iPad, and a bunch of folders and books. Add power cables, an umbrella, a beverage, pens, cards, keys, phone, and whatever you want to put in a zipper pouch. Oh, and then there's the other velcro pouch inside one of the partitions.