Transistor and is ubiquitous in modern electronic systems. Julius Edgar Lilienfeld patented a field-effect transistor in 1926 but it was not possible to actually construct a working device at that time. The first practically implemented device was a point-contact transistor invented in 1947 by American physicists John Bardeen, Walter Brattain, and William Shockley. The transistor revolutionized the field of electronics, and paved the way for smaller and cheaper radios, calculators, and computers, among other things. The transistor is on the list of IEEE milestones in electronics, and Bardeen, Brattain, and Shockley shared the 1956 Nobel Prize in Physics for their achievement.
Wharton School of the University of Pennsylvania Albert S. Bolles, a lawyer, served as Wharton's first professor, and the school's Industrial Research Unit was established in 1921. Wharton professor Simon Kuznets, who later won the Nobel Prize in Economics, created statistical data on national output, prices, investment, and capital stock, and also measured seasonability, cycles, and secular trends of these phenomena. His work laid out what became the standard procedure for measuring the gross national product and the gross domestic product, and he later led an international effort to establish the same statistical information for all national economies. Professor Lawrence Klein, who also won the Nobel Prize