Yeah, when I first started, I had to look a lot of them up.

But that's how I learned them.

It's not elitism -- it's just quicker.

If I am going to LaGuardia I'm just going to type LGA.

Can I type out LaGuardia? Sure. But then, for new people, they may not know where that is either, so do I have to type 'New York LaGuardia'?

That's a pain. In fact I keep spelling LaGuardia wrong as I type this.