PRE-COMPUTERS
1845 - Telegraph - Washington and Baltimore linked
1845 - Bell’s telephone (developed till the 80’s)
1877 - Edison’s phonograph (79 electric light)
1899 - Marconi - wireless telegraphy
1939 - Television appears
1940 - Electron microscope developed
1948 - Transistor developed
1960 - Fiber optics introduced
1976 - Small electronic calculator introduced