The first era, the era of "industrialization", roughly covered the years from 1800 to 1938. In these days, world expositions were largely focused on trade and displayed technological advances and inventions. World expositions were platforms for state-of-the-art science and technology from around the world. The world expositions of 1851 London, 1853 New York, 1862 London, 1876 Philadelphia, Paris 1878, 1888 Barcelona, 1889 Paris, 1891 Prague, 1893 Chicago, 1897 Brussels, 1900 Paris, 1904 St. Louis, 1915 San Francisco, and 1933–34 Chicago were notable in this respect. Inventions such as the telephone were first presented during this era. This era set the basic character of the world fair.