(English trade name Elisa Corporation) is a Finnish telecommunications company founded in 1882. Its previous names were Helsingin Puhelin (until July 2000) and Elisa Communications Oyj (until 2003). Elisa is a telecommunications, ICT and online service company operating mainly in Finland and Estonia, but it also offers digital services for international operators and other companies. In Finland Elisa is the market leader in mobile and fixed network subscriptions. Elisa provides services for communication and entertainment, and tools for improving operating methods and productivity of organisations. It cooperates for example with Vodafone and Tele2. Elisa offers fixed and mobile subscriptions and broadband subscriptions under Elisa and Elisa Saunalahti brands but also cable-tv-subscriptions. Elisa's digital services offerd in Elisa Polystar and Elisa IndustrIQ brands internationally. Elisa Kirja is an ebook service. and Elisa Viihde is producing Finnish drama. Elisa is listed on Nasdaq Helsinki. In 2022, Elisa's revenue was 2.1 billion euros, and the company employed over 5,600 people. In 2021, it was the third largest IT company in Finland in terms of turnover History The roots of Elisa (1882–1999) On 1882 electrical engineer Daniel Wadén started a telephone company called Helsingin Telefooni (telephone of Helsinki). In 1985 the company became Helsingin Puhelin. The company launched the first commercial GSM service under the Radiolinja brand in 1991. In 1995 Radiolinja Eesti AS started operating in Estonia with a GSM network. In 1997 the company was listed on the Helsinki Stock Exchange as Helsingin Puhelin Oyj. Elisa Communications Oyj (2000-2003) In 2000, the company got a new name: Elisa Communications Oyj. In 2002 Elisa started to cooperate with Vodafone. Elisa Oyj (2003–present) Since 2003 the company's name has been Elisa Oyj. In 2005 investment company Novator Partners acquired a 10.4% stake in Elisa through a share swap when Elisa bought the smaller operator Saunalahti, which had been mostly owned by Novator. Novator tried to revamp Elisa in December 2007, but was opposed by Finnish institutions such as Varma Mutual Pension Insurance Company. In October 2008, during the Icelandic financial crisis, Novator sold its entire stake in Elisa to Varma for 194 million euros (US$266 million), a price of €11.20 per share. In 2005 Radiolinja Eesti AS and fixed and Uninet AS providing fixed networks were merged as Elisa. Elisa launched the world's first commercial UMTS900 network on 8 November 2007. In 2011 Elisa opened a webstore selling E-books. Elisa Kirja (Elisa Book) service