Perhaps the best and most recent example is the transfer-machine in engineering. They have greatly widened the range of operations that can be performed automatically and they have mechanized some loading and unloading of machines. Since then technical development has been gradual and continuous. These machines performed automatically, once they were set and loaded, and they confined human operator to the following kinds of work, unskilled work of loading and unloading, and the skilled work of setting and maintaining machines. ![]() They were, for instance, the textile machines and, later on, the lathes widely employed in engineering. But semi-automatic machines were invented early in the history of mechanization. They performed many physical tasks but had to be operated and controlled by workers. ![]() So far as automation replaces human muscle by mechanical power, it continues a process of mechanization which began before the Industrial Revolution two centuries ago.
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