How to run Unix on my pc

[YU22]

Duron 600@900
Asus A7V
256mb PC100
60 Matrox HD
usb mouse(ps2 adapter avaible)
ps2 keyboard

How do I install Unix on this system? Which version do I need?

 

[PHATJACK]

I think FreeBSD is Unix.

 

[Deceiver]

Any of the linux distributions will work. The ISOs can be found at LinuxISO.com RedHat or Mandrake might be the easiest for beginners.