It’s pronounced “vee-eye”, not “six”

The pronunciation guide for unix describes how to pronounce UNIX symbols:

How do I pronounce “vi” , or “!”, or “/*”, or …? You can start a very long and pointless discussion by wondering about this topic on the net. Some people say “vye”, some say "vee-eye" (the vi manual suggests this) and some Roman numerologists say "six".

How is BIOS pronounced?