A backpack (also called rucksack, knapsack, packsack, pack, Haversack, or Bergen) is, in its simplest form, a cloth sack carried on one's back and secured with two straps that go over the shoulders, but there can be exceptions. There are many ways to carry backpacks. One way is to carry it in one hand (like a briefcase). Backpacks are often preferred to handbags for carrying heavy loads, because the shoulders are better suited for bearing heavy weights for long periods of time than the hands.… (More on Backpack)