Answer:
No matter how much rain gets on me, I won't get any wetter. What am I?
Some will use me, others not. Some have remembered, others forgot. For profit or gain, I'm used expertly. I can't be picked off the ground or tossed into the sea. What am I?
I have memories, but none of my own. Whatever's on my inside is what is shown. If I'm ever different, it's because you changed me. I feel like a decoration, here for you to arrange me. What am I?
I will disappear every time you say my name.
I save lives on the ground and in the air. What am I?
Dark, feathery, and popular in Baltimore and fantasy books.