Answer:
You hear me speak, for I have a hard tongue. But I cannot breathe, for I have not a lung. What am I?
My teeth are sharp my back is straight to cut things up it is my fate.
I'm tall when I'm young and I'm short when I'm old. What am I?
You used to come to me for all sorts of information and knowledge before the internet was born
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.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?