A few basic questions for a beginner.

Hello!

I am a drafter for a Civil engineering Firm and i have been tasked with learning Openroads and SUDA (Subsurface Utility Design and Analysis) . The only problem is i know almost nothing about Openroads, or inroads, or anything other than basic drafting in microstation. First question, what is the difference between Openroads and Power inroads? The people in my office use the two names synonymously. Second question, i am trying to learn power inroads on the bentley learn serve but i cant find anything on drainage design and analysis. I need to find out what SUDA is, and how to explain what it is.