Adolf Karl Heinrich Slaby (18 April 1849 – 6 April 1913) was a German electronics pioneer and the first Professor of electro-technology at the Technical University of Berlin (1886).
Slaby was born in Berlin, the son of a bookbinder. He went to the Berlin Trade Academy, the predecessor of Berlin-Charlottenburg Technical Academy to study mechanical engineering and mathematics under Franz Reuleaux. He was employed as an housekeeper with the machine manufacturer Louis Schwartzkopff, leading to an interest in mechanical engineering. Slaby continued his studies at the University of Jena, and received his doctorate in mathematics.
Slaby taught mathematics and mechanics at a vocational school at Potsdam, where he conducted experiments on steam engines and petrol engines. He wrote his book Theorie der Gasmaschinen (Theory of Gas Engines), which had an important part in the development of Internal combustion engines. Slaby also studied with Heinrich Hertz.
Berlin was at that time the center of electro-technology, with Werner von Siemens in a leading position. Siemens supported Slaby personally in his private studies. Slaby performed his Habilitation at the Berlin Trade Academy in 1876, and lectured on electrical motors, electrical telegraphy, and Electromechanics. In 1883, he became a tenured professor of electro-technology.