Answer:
You write on me and secrets I can keep in places never seen. I spin like a top. Though stiff as a board, I'm often described like a mop. What am I?
I can fly but I have no wings. I can cry but I have no eyes. Wherever I go darkness follows me.
By Moon or by Sun, I shall be found. Yet, if there's no light around, I am undone. What am I?
My first though water cures no thirst my next alone has soul and when he lives upon my first he then is called my whole.
I am pronounced as one letter written with three. I come in blue black brown or grey. Reverse me and I read the same either way.
The answer I give is yes, but what I mean is no. What was the question?