ykki :
http://pcsupport.about.com/od/termsb/p/bios.htm
No, BIOS is a basic firmware that comes in pre loaded with a mobo.
Different companies have different BIOS but they pretty much do the same thing.
I meant a z87 board won't have the same BIOS as a b85 board, and a different manufacturer will probably use a different BIOS than a different manufacturer. I do wonder if a board in a different country might end up with a different BIOS to meet standards, I don't think that would ever happen but I guess it's possible.