Answer:
You find me behind the stars; or in a sixth seventh or third. It takes something round a computer and me to make pie. I am bigger than anything you can think of.
I am born in fear raised in truth and I come to my own in deed. When comes a time that I'm called forth I come to serve the cause of need.
Blade to blade I always win My foe laid low and even. Yard by yard through thick and thin I'm busiest in season.
People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?
What can you break even if you never pick it up or touch it?
Why is the letter B always cool?