Originally posted by macmax
so the pc system is windows>???
this might seem strange, but i thought the architecture of the pc was os x86
"PC" is commonly used to describe a computer running Windows, but technically, it's just a "personal computer." Macs are also PCs.
x86 refers to Intel processors which used to be called 8086, 286, 386, 486, etc. After 486, Intel started calling their chips with names, i.e. Pentium, Celeron, etc. Windows runs on Intel chips... But so can Linux and other "PC" OSes.
I think the original question you meant to ask is the difference between Mac OS X and MS Windows. I don't know where UNIX comes in, except that since OS X is based on UNIX technology, you might have thought OS X is the same as UNIX...
Other than the fact OS X is made by Apple and Windows by Microsoft, differences are mostly due to taste. OS X runs on PPC, which are RISC chips while Windows runs on Intel/AMD chips, which are CISC chips. ([ed] actually, my knowledge is fuzzy here... AMD is still CISC, right? differences between them are kinda small these days, but...) Both OSes are 32 bit, GUI based...
Usability, stability, etc. are based on personal taste, though since this is a Mac forum, you'll find most people here finding OS X to be more usable and stable.