Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Arthur Dehon Little was an American chemist and chemical engineer. He founded the consulting company Arthur D. Little and was instrumental in developing chemical engineering at the Massachusetts Institute of Technology. He is credited with introducing the term unit operations to chemical engineering and promoting the concept of industrial research. Little was born in Boston, Massachusetts, and studied chemistry at MIT from 1881 to 1884. In 1901 he married Henrietta Rogers Anthony. He died August 1, 1935 in Northeast Harbor, Maine