Alcatraz receives its first federal prisoners — 1934On August 11, 1934, the first federal prisoners arrived at Alcatraz Island in San Francisco Bay. Babe Ruth hits his 500th home run — 1929On August 11, 1929, Babe Ruth became the first player in Major League Baseball history to hit 500 career home runs. A patent that helped inspire modern wireless technology — 1942On August 11, 1942, actress and inventor Hedy Lamarr and composer George Antheil received a patent for a frequency-hopping system designed to help guide radio-controlled torpedoes. The beginning of hip-hop’s history — 1973On August 11, 1973, DJ Kool Herc hosted a back-to-school party in the recreation room of an apartment building in the Bronx. August 11 is also the birthday of Steve Wozniak, who was born in 1950.