go to http://www.vmunix.com/fbsd-book/ for a good free bsd unix guid.
Down load free bsd at
ftp://ftp.freebsd.org/pub/FreeBSD/releases/i386/ISO-IMAGES/
this is an iso bootable image (burn it to a cd)and is around 650 meg
freebsd.org has some great info as well
go to SUN.com
register for ther online download and then down load solaris 8 for the x86 its 3 cd's and iso images (and while your at it download star office)
the Be os can be downloaded at be.com
you may also like the os on a disk at qnx.com
a 1.44 with web , download the iso 350 meg aprox for non profit use free
you can also buy bsd at staples or what ever 4.2 newest arond 50$ for 9 cds
Later.