OT: How to cluster two computers

[Enrique Arredondo]

Does anybody knows how to make to computers work as one ? Is it by 
connecting them using a network connection or SCSI connection ? Can I 
cluster SCO boxes ? Windoze Boxes ? LInux Boxes ? I'm a real begginer on 
this thing but if I can make 2 computers or more share a workload instead 
of having a dual CPU computer would be interesting to see how filepro 
works with clusters. I once read that somebody clustered 250 PS2 (play 
station 2) or XBOX and then installed linux and made a super computer. And 
my guess is that I can do the same with PC's right ?

Regards,

Enrique