If I install mac os snow leopard on my windows 7 home premium 64 bit how can I switch back on windows?

Everyone above me is wrong. This is why PC users should NOT answer Mac questions. They never have any idea what they are talking about.

Macs do not have a BIOS, they have EFI (Extensible Firmware Interface) - it works a little differently. You press predefined keys with EFI commands bound to them at boot up to make the Mac do things. Pressing and holding 'c' boots from the CD drive, 's' boots in to single user mode - there are 50+ boot up key commands http://www.jacsoft.co.nz/Tech_Notes/Mac_... To boot in to EFI (like boting in to BIOS) you press CMD-OPT-O-F at boot.

EFI is just a command line interface. There are many more commands in EFI then just what is bound to the keys at boot up. http://www.firmworks.com/QuickRef.html Just for future reference - never listen to Windows users when it comes to Mac.

Seriously, Windows users don't have a clue how Macs work.

Every computer has a BIOS, but on a Mac you cannot enter it. There are no reasons for either.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.