What female was first to score a "perfect 10" for a single routine in artistic gymnastics in the Olympic Games?

On 18 July 1976, 14-year-old Romanian gymnast Nadia Comăneci performed in the uneven bars event and was awarded a score of 10. Because the scoreboard only allowed three digits, it had to display her score as 1.00. This led to total confusion, with even Comăneci unsure of what it meant, until the announcer informed the elated crowd that she had scored a perfect 10. Comăneci scored a total of seven 10s at the 1976 Olympics—four on the uneven bars and three on the balance beam. Her main rival, Russian Nelli Kim, scored two 10s in the same competition, in the vault and floor exercise. Comăneci's coach, Béla Károlyi, having defected to the United States in 1981, subsequently coached Mary Lou Retton to gold at the 1984 Olympics in Los Angeles, where she scored 10s in the vault and floor exercise.