In the year 2013, Indian cinema, popularly known as Bollywood, celebrated its centenary milestone. In these 100 years of cinematic heritage of Indian film industry, Bollywood has produced thousands of movies portraying all genres in the most beautiful way. Music and dance have always been the most outstanding part of Indian cinema that you find nowhere else in the world. Bollywood is known for its music and dance all over the world and it has been always the strongest area for Indian film industry. Still, Indian cinema has produced some brilliant tech based movies which has always been the strong genre of Hollywood. Here are few of the best tech movies of Bollywood which you should watch once: Elaan (1971) Elaan is a 1971 bollywood thriller movie starring Vinod Khanna, Rekha and Vinod Mehra in the lead roles. This is one of the few movies where Vinod Khanna plays the antagonist. The movie is about an atomic ring which can make a person invisible. [caption id="" align=...