Answer:
I go through a door but never go in, and never come out. What am I?
I can be swallowed, but I can also swallow you. What am I?
You used to come to me for all sorts of information and knowledge before the internet was born
I plow and plow, but never sow. What am I?
I always run but never walk often murmur but never talk have a bed but never sleep has a mouth but never eat.
I am rarely touched but often held. If you are smart you'll use me well. What am I?