32 bit is a bit limited you can not use more then 3.5 gigs of ram you can not run 64bit apps on 32bit OS of. But most computers now can support 64bit. 32bit has be around for years now 64bit is the next generation of computers now. with 64bit you can do a lot more then you could with a 32bit system if you have a new computer and it has more then 4 gigs of memory its best to us 64bit OS then a 32bit OS tho we will probably see 128bit in a few years from now

go here to learn more http://en.wikipedia.org/wiki/64-bit

yes then a few years later 256bit then 512bit & so on.....all the time screwing us along to spend & spend!

32 bits is the answer, can I have my prize now?