Harold "Hal" Abelson is a professor of electrical engineering and computer science at the Massachusetts Institute of Technology , a fellow of the Institute of Electrical and Electronics Engineers , and a founding director of both Creative Commons and the Free Software Foundation.
He directed the first implementation of the language Logo for the Apple II, which made the language widely available on personal computers starting in 1981; and published a widely selling book on Logo in 1982. Together with Gerald Jay Sussman, Abelson developed MIT's introductory computer science subject, The Structure and Interpretation of Computer Programs , a subject organized around the idea that a computer language is primarily a formal medium for expressing ideas about methodology, rather than just a way to get a computer to perform operations. Abelson and Sussman also cooperate in codirecting the MIT Project on Mathematics and Computation. The MIT OpenCourseWare project was spearheaded by Abelson and other MIT faculty.
Abelson led an internal investigation of the school's choices and role in the prosecution of Aaron Swartz by the Federal Bureau of Investigation , which concluded that MIT did nothing wrong legally, but recommended that MIT consider changing some of its internal policies. Wikipedia