A little childhood memory

I can say I did enjoy my childhood days. I enjoyed playing toys with our neighbors. I enjoyed talking what we want to be when we grow up.

Most of my childhood friends are working now, and just recently, I have good friend who passed the Engineering Board Exam. He's now a licensed Engineer.

I never imagined myself taking engineering course that's why I took accountancy. So I wonder, does all engineers use threaded rod? I must ask him.