Mobile telephony
During the 1990s Sweden became a leading power in information technology. Swedish Prime Minister Carl Bildt (M) and American President Bill Clinton were the world's first heads of government to exchange e-mail. Mobile telephony spread fast during the same decade, thanks to fruitful cooperation between the manufacturer Ericsson and government-owned network operator Televerket (which is now part of TeliaSonera). Sweden has converted to digital terrestrial television and is expanding the 3G network.