SPEAKER 1: Did you know that, apart from the main course, CS50 offers a variety of classes built for any specific areas of computer science you might be interested in. All of them are available for free, and include Web Programming with Python and JavaScript, Introduction to Game Development, Introduction to Artificial Intelligence with Python, Computer Science for Lawyers, Computer Science for Business Professionals, Understanding Technology, Introduction to Programming with Scratch, and Introduction to Programming with Python that starts later in the spring. We'll be talking about each of them in more depth in the coming weeks, but you can go to edx.org/cs50 and check out those of interest to you now. This is CS50. 

[MUSIC - KID CUDI, "PURSUIT OF HAPPINESS"] 

KID CUDI: (SINGING) I'll be good.