Thank you very much D.C your links are very interesting

I was wandering if I could get a software like that Demo Software on your suggested website where you can really use it on your PC in which you can make programms, the same as a normal CNC Machine on the shop floor
I didn't know even that existed such a software like that Demo Software now I know and I want a proper software even if I have to pay for that, where could I get it? If I am able to get it I have all I need to refresh my memory... Thank you very much indeed again