Linux

Hello group.
I have a couple of questions I hope you can answer. First is it possible for
me to download a copy of linux for my pc (I have a cable modem), If so what
is recomended? The different varietys of Linux, I know nothing about it and
wanted to learn.

Can someone tell me the difference in why someone would use and AS400 vs an
RS6000. They both have Risc processors, and different operating systems. I
prefer to use an AS400 for the ease of use. My backgound has always been
wholesale/retail, or manufacturing. I used the RS6000 at one place instead
of an AS400, I don't know why, other than that is what was in place when I
started working there. Then I went to work at a manufacturing company that
had both. We ran our business applications on the AS400 and an (Awesome)
automated warehouse on the RS6000.  I've been told in the past that RS6000's
were more of a precision box for engineers. I'm just trying to put into
prospective of when to use which System. Any and all help is greatly
appreciated.

Thanks
Troy Dills