David J. Malan is Gordon McKay Professor of the Practice of Computer Science in the School of Engineering and Applied Sciences and a Member of the Faculty of Education in the Graduate School of Education at Harvard University. He teaches Computer Science 50, otherwise known as CS50, which is Harvard University’s largest course, one of Yale University’s largest courses, and edX’s largest MOOC, with over 2.9M registrants. He also teaches at Harvard Business School, Harvard Law School, Harvard Extension School, and Harvard Summer School. All of his courses are freely available as OpenCourseWare.


  • Ph.D., Computer Science, 2007
    Harvard University
  • S.M., Computer Science, 2004
    Harvard University
  • A.B., Computer Science, 1999
    Harvard University


  • cybersecurity
  • digital forensics
  • botnets
  • computer science education
  • distance learning
  • collaborative learning
  • computer-assisted instruction