An American chemist and chemical engineer who founded a major consulting company. He was instrumental in founding chemical engineering at MIT and is credited with coining the term unit operations. A graduate of chemistry from MIT, he formed a partnership with chemist Roger B. Griffin who was later to die in a laboratory accident in 1893. Working by himself and then closely with MIT and, in particular, with William Hultz Walker, he formed another partnership, Little and Walker, in 1900. After dissolving the company five years later he continued again on his own and established Arthur D. Little in 1909, which is today a leading international management consultancy that covers many industrial sectors. Arthur D. Little taught papermaking at MIT from 1893 to 1916. He was president of the American Chemical Society (1912–14), president of the American Institute of Chemical Engineers (1919), and president of the Society of Chemical Engineering (1928–29).