how to bypass bios passwords

I’ve long kind of had an idea that makers would put backdoor passwords into BIOS implementations, but never really looked into it. Then I happened upon this posting one day which lists a lot of backdoor passwords for various BIOS platforms and versions. Pay particular attention to the mention that some BIOS lock themselves after a few incorrect attempts, so be cautious. I’ve not tested any of these, but it would be very fun to play with.