Television is 100 years old, with the first public demonstration of live television taking place on January 26, 1926, by John Logie Baird in London. Baird's invention used a mechanical system to transmit images, but it was eventually replaced by electronic systems developed by others, including Philo Farnsworth. The development of television involved the contributions of many inventors and engineers over several decades. Today, television technology has evolved significantly, but its origins are still celebrated as a major milestone in the history of communication.