In 1882 – Ernst Werner von Siemens presented his “trackless trolley” called the “Elektromote” in a Berlin suburb. The system pulled electricity from overhead wires, but used road wheels instead of tracks.
In 1953 – KECA-TV, an ABC affiliate in Los Angeles, California, broadcast the first US experimental 3D-TV. An episode of Space Patrol required specially polarized glasses to watch.
In 2005 – Apple released Mac OS X 10.4 Tiger, introducing spotlight search and dashboard functionality.