Things you (probably) didn't see in logos

I recently just noticed somethings in logos.Like non-obvious things.I gathered info on 3 logos.Hopefully I'll notice more.Also don't call me stupid since I just noticed.

Less Noticeable- FedEx 

There is an arrow between E and x. I'm not sure what it means though.

Pretty Obvious- Staples

The L is a staple.

Least Obvious- Amazon

Its not a smile,peps.It means amazon has items form a-z.

BYYYYYYEEEEEEEEEEEEEEEEEE