Utility had been deliberately excluded from Aristotelian natural philosophy. Aristotle had nothing against practical knowledge, which he called techne; he simply did not consider it to be the same kind of thing as scientific knowledge, which he called episteme. From techne we have the word technology, which means to us largely the application of scientific knowledge, while from episteme we have the word epistemology, a branch of philosophy that deals with the theory of knowledge, scientific or any other. For Aristotle, however, the difference between techne and episteme was not a difference between application and theory, but was one of sources of knowledge and goals of knowledge. The source of technical knowledge was practical experience and its goal was, roughly speaking, knowing what to do next time. The source of scientific knowledge was reason, and its goal was the understanding of things through their causes.
– Stillman Drake, Galileo A Very Short Introduction (p. 4)