History of Electrical Engineering
William GilbertDe magnete, Magneticisique Corporibus (On the Magnet) which was the research and observation made by him on electricity and magnetism. Gilbert was the one who coined the expression "electrica."
Otto von Guericke proved that a vacuum could exist. Creating a vacuum was essential for all kinds of further research into electronics. In 1660, Otto von Guericke invented a machine that produced static electricity, this was the first electric generator.