Electromechanical era.

It goes from 1840 to 1940 and represents an important change in technology history because they converted information and knowledge into electrical impulses; the key was the discvery of ways to control and use the electricity.

The most important iventions on this era were:

• Colossus machine (1st. calculator created by the british).

 

•  Voltaic battery (by Alessandro Volta in 1799).

•  Telegraph (by SAmuel F.J. Morse in 1832).

• Telephone and radio (by Bell and Watson in 1876; Marconi invented the first radio-telegraph).

 

• Mark 1(by IBM) .