The typewriter, telephone and television broadcast, the Statue of Liberty and the Ferris wheel, the X-ray machine and the ice cream cone, all of them exhibited at World Expos.
The computer was called Programma 101 and it was presented at the New York World's Fair. They sold 44,000 units all over the world. The initial price in the US was US$ 3,200.
The war had been going on for six months when Picasso was given a commission to produce a large-scale mural for the Spanish Republic's Pavilion at the 1937 World's Fair in Paris, where Picasso was living.
Perhaps the most extraordinary building of the nineteenth century was the Crystal Palace, which was built in Hyde Park for the Great Exhibition of 1851.
The original 1859 patent for revolving stairs said they could be used for standing or walking, but the first working prototypes were used as attractions at Coney Island and the World's Fair.
When he finally launched it at the World's Fair in Chicago in 1893, Fahlberg marketed saccharin as a " perfectly harmless spice" , 500 times sweeter than " the best sugar" .
Residents of Dubai are celebrating their city has been chosen to host the world Expo trade convention in 2020, beating rival bids in Brazil, Turkey and Russia.
And a year later when Edwin took his wife and two girls for a week-long trip to the World's Fair in St. Louis; the Judge considered the trip an extravagant waste of money and further proof of Edwin's spendthrift habits.