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Major advances came with the event of the vacuum tube by Lee de Forest of the United States within the early 20th century and the invention of the transistor in the mid-20th century. In the late 20th century electrical and electronics engineers outnumbered all others in the world. are concerned in the design, analysis, improvement, testing, modification, inspection and maintaining of a variety of merchandise, constructions and techniques. Senior Automation Engineer It is difficult to over-emphasise the significance of engineering on human historical past, from desi