"Historians of technology have distinguished five eras in the history of technology: an era
dominated by human muscle power, an era when human power was supplemented by
animal power, an era of water power, an era of steam power, and an era of nuclear
power. In each of these eras the major source of power, or energy, determined the
types of products that emerged and the size of the machinery and tools developed to
make these products..."
Publisher
Language
Country