Why are iPhones advertised at 16GB?

IPhones are advertised at 16GB. I know the operating system takes up space, but instead of saying how much the consumer can actually use, they advertise the entire storage, which includes the operating system. That's kind of misleading.

And that goes for all storage sizes.

I agree. I'm getting fed up with apple

They advertise it like that because 1. You think you are buying the full 16GB when in reality the buyer gets less 2.It's a rounded number

Think about it wouldn't it sound odd saying 15.5GB iPhone 5? It sounds better for Apple to say 16GB iPhone 5.

Same reason prices are always ending in.99. Makes you think you get more for your money.