I came over to Snow Leopard from Windows and always thought OS X til I heard it at a WWDC. Later, I met professors that had used OS 9, System 7, etc. and they a

I came over to Snow Leopard from Windows and always thought OS X til I heard it at a WWDC. Later, I met professors that had used OS 9, System 7, etc. and they always said OS 10 consistently.