William Hewlett co-founded Hewlett-Packard Company in 1939 and served as its President from 1964 to 1977 and CEO from 1968 to 1978. He developed technologies like the first desktop calculator in 1964 and the first scientific hand-held calculator in 1972 that revolutionized computing. Throughout his career, Hewlett made accomplishments in science, business, medicine, and technology that helped establish HP as an industry leader and set new standards.