FOUNDERS OF DEVICES RELATED TO COMPUTER 

Keyboard-------------- Christopher Latham Sholes  (1868)

Mouse------------------Douglas Engelbart (1964)

Printer-------------------Johannes Gutenberg (1938) 

Computer---------------Charles Babbage (1936)

Transistor.....................William Shokley, Walter Houser Brattain and John Bardeen (1947)

Scanner ------------------Bell Labs (1970)

Speaker-------------------John Edward W. Kellog  (1898)