Super Cassettes Industries Private Limited, doing business as T-Series,[note 1] is a music record label and film production company in India founded by Gulshan Kumar in 1983. It is primarily known for Bollywood music soundtracks and Indi-pop music. As of 2014, T-Series is India's largest music record label, with up to a 35% share of the Indian music market, followed by Sony Music India and Zee Music. T-Series also owns and operates the most-viewed and most-subscribed channel on YouTube, with over 147 million subscribers and 117 billion views as of July 2020. While best known as a music label, T-Series has also had some moderate success as a film production company.
Kumar, initially a fruit juice seller in Delhi, founded T-Series to sell pirated Bollywood songs before the company eventually began producing new music. Their breakthrough came with the soundtrack for the 1988 Bollywood blockbuster Qayamat Se Qayamat Tak, composed by Anand-Milind, written by Majrooh Sultanpuri, and starring Aamir Khan and Juhi Chawla, which became one of the best-selling Indian music albums of the 1980s, with over 8 million sales. They eventually became a leading music label with the release of Aashiqui (1990), composed by Nadeem–Shravan, which sold 20 million copies and became the best-selling Indian soundtrack album of all time. However, Gulshan Kumar was murdered by the Mumbai mafia syndicate D-Company in 1997. Since then, T-Series has been led by his son Bhushan Kumar and younger brother Krishan Kumar.
On YouTube, T-Series has a multi-channel network, with 29 channels (excluding Lahari Music) that have more than 184 million subscribers as of July 2019. The company's YouTube team consists of 13 people at the T-Series headquarters. The company's main T-Series channel on YouTube primarily shows music videos as well as film trailers. It became the most-viewed YouTube channel in January 2017. The T-Series channel primarily features content in the Hindi language, and occasionally several other languages including English, Portuguese and Spanish. T-Series also have other channels dedicated to content in several Indian languages including Punjabi, Urdu, Tamil, Telugu, Malayalam, Kannada, Bhojpuri, Gujarati, Marathi and Rajasthani.