Answer:
I help engines spin and pants stay up. What am I?
You used to come to me for all sorts of information and knowledge before the internet was born
I am often sold by children entrepreneurs in summer time
I go around in circles, but always straight ahead, never complain, no matter where I am led.
A thousand wheels but move I do not. Call me what I am call me a lot.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?