Although they had been invented during WWII, nachos wouldn’t become well known worldwide until a Monday Night Football game in 1978, when during the Baltimore Colts/Dallas Cowboys games, Howard Cosell kept mentioning them (Texas Stadium happened to be serving them, which helped considerably).
Frank Liberto, the father of concession stand nachos, who owned San Antonio-based Ricos Products, isn’t credited with inventing nachos, of course. That is left to Ignacio Anaya, who came up with the dish in 1943 at a restaurant in the Mexico border city of Piedras Negras.