Think about this: What if everyone in the world was named Purple? And we would have like Purple 1, Purple 2, Purple Quite A Lot, Purple 6.1 billions and so on. Now, to not complicate matters, we could recycle names, so when Purple 1 have left this neat (I wish it was neat, anyway) planet, it could be used again. Like memory on the heap. Now, let's say that we won't support more then like 10 billion people, we can store any name in just 34 bits!