14-year old Romanian gymnast Nadia Comăneci at the XXI Olympiad in Montreal, Canada - July 22, 1976
During a team competition on July 18, Comaneci’s routine on the uneven bars was awarded a perfect ten. It was the first time in modern Olympic gymnastics history that the score had ever been awarded. When Omega SA, the traditional Olympics scoreboard manufacturer, asked before the 1976 games whether four digits would be necessary for gymnastics, it was told that a perfect 10.00 was not possible. Nadia’s perfect marks were thus displayed as 1.00 instead.
Comăneci would earn six additional tens, en route to capturing the all-around, beam, and bars titles, and a bronze medal on the floor exercise. The Romanian team also placed second in the team competition, capturing silver. http://en.wikipedia.org/wiki/Nadia_Comăneci