Telecommunication has its origins in the early 19th century with the development of visual telegraph systems and electrical telegraphs. The modern telephone was patented by Alexander Graham Bell in 1876. Major developments in telecommunication continued throughout the 20th century with radio, television, computers and cellular networks. Today, India has one of the fastest growing telecommunication industries in the world with over 500 million subscribers across cellular, landline, internet and value-added services. Leading players include Bharti Airtel, Reliance Communications, Vodafone and BSNL. The government is also taking initiatives to increase rural connectivity.