The best inventions of the 20th century, it have been the mobile and the computer. Since with the mobile you can speak to long distances and with the computer you can look for information of all kinds and to communicate also with the persons.


Martin Cooper was the pioneer in this technology. Introducion the first radioteléfono, in 1973, in The United States.


In 1947, the first digital computer, he invented Jhon Mauchly. In 1949, he perfected the computing Jhon Newman.