Lately I have been spending more time filling in my knowledge gaps, well today I decided I wanted to learn more about Operating Systems so I went to visit my trusty friend google and here is what I found, http://www.howstuffworks.com/operating-system1.htm

I knew about unix based operating systems, windows operating systems and macintosh but I thought it ended there. Now I am learning that it there are specialized operating systems made for robotics, industrial controll, mainframes and more. I have a diploma in Electronics Engineering so this is very interesting for me. I knew that you can program these chips called PLDs (Programable Logic Devices) and you could program processors and microcontrollers to be used in robotics, but I never thought operating systems were needed. I am a mix between a electronics hobyist and a computer geek, if you may call me that. I have a wide spectrim of interest when it comes to computers. Anyways to bring this thread to a point, has anyone here had any experience with operating systems other then Unix, Windows and mac OSs,. Also if you have used difernt versions of Unix what ones have you tryed.