History & Generation Of Computer:

MUST WATCH, Its CARTOONS:  https://www.youtube.com/watch?v=t4QJJFKmgvc

MORE:
Introduction: https://www.youtube.com/watch?v=nX7Tu8mT3dY

Introduction: https://www.youtube.com/watch?v=LJ5c3AycRIE
Vacuume Tube: https://www.youtube.com/watch?v=6UlHKOQP_DE