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CS50
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<p> CS50 (Computer Science 50) is an introductory course on <a href="/facts/Computer_science/lN3pEyPz">computer science</a> taught at <a href="/facts/Harvard_University/Lhy9L1cx">Harvard University</a> by <a href="/facts/David_J._Malan/a7o1pjHg">David J. Malan</a>. The on-campus version of the course is Harvard's largest class with 800 students, 102 staff, and up to 2,200 participants in their regular <a href="/facts/Hackathon/BqwMoH8j">hackathons</a>. The course was first offered on campus in 1989, and Malan has been the course's instructor since 2007. Notable industry experts including <a href="/facts/Mark_Zuckerberg/TJpEwVE6">Mark Zuckerberg</a> and <a href="/facts/Steve_Ballmer/8Yrdmxkp">Steve Ballmer</a> have given guest lectures. </p><p>An <a href="/facts/Online_course/5lf2A2Vj">online version</a> of the course, CS50x, is available through the platforms <a href="/facts/EdX/4m5N55qS">edX</a> and <a href="/facts/OpenCourseWare/cnUEDswp">OpenCourseWare</a> and follows the same curriculum as the in-person format of the course. All CS50x course materials are free and there is no fee to complete the course, though various verified certificates are available for a fee. As of 2024,<a href="https://en.wikipedia.org/w/index.php?title=CS50&action=edit">[update]</a> CS50x teaches the languages <a href="/facts/C_(programming_language)/Ky2No763">C</a>, <a href="/facts/Python_(programming_language)/YbuGqofa">Python</a>, <a href="/facts/SQL/UjQLJcYm">SQL</a>, <a href="/facts/HTML/sSc3fT78">HTML</a>, <a href="/facts/CSS/tA90XBQo">CSS</a>, and <a href="/facts/JavaScript/XhhIIEsl">JavaScript</a>. It also teaches fundamental computer science concepts including <a href="/facts/Data_structure/yNsNvL1I">data structures</a> and the <a href="/facts/Flask_(web_framework)/ubK8Ry4U">Flask</a> framework. New content is added to the course each year; additional lectures on <a href="/facts/Cybersecurity/7E5dIy7G">cybersecurity</a> and <a href="/facts/Emoji/Qkp7gwBH">emoji</a> were added for 2022. Another adapted version of the course, CS50 AP, is designed for high school students and completes the required curriculum of <a href="/facts/AP_Computer_Science_Principles/6v8xAPGx">AP Computer Science Principles</a>. </p>