Traveller's cheques and credit cards (American Express, Visa, Mastercard) are exchanged for Vietnamese dong at the banks. Cards can be used in travel agencies, hotels, and major restaurants. US currency is exchanged for Vietnamese dong and treasury notes in banks, exchange bureaus, hotels, and jewellery shops.
Nikola Tesla designed the first hydroelectric power plant at Niagara Falls, New York which started producing electrical power in 1895. This was the beginning of the electrification of the United States and the rest of the world. Today, Teslaâs AC electricity is lighting and powering the globe.
('Nikola Tesla' was a phone hardware company in Zagreb before Ericsson bought it in the 1990s) in honour of Nikola Tesla's pioneering work in wireless communication. The year 2006 was celebrated by UNESCO as the 150th anniversary of the birth of Nikola Tesla, scientist (1856-1943), as well as being proclaimed by the governments of Croatia and Serbia to be the Year of Tesla.