CS50x: Introduction to Computer Science

A free online Harvard University course introducing fundamental concepts of computer science and programming. Covers C, Python, SQL, algorithms, data structures, HTML, CSS, JavaScript, Flask and artificial intelligence. The course culminates in an independently designed final project.

Harvard-level curriculum; strong computer science foundation; practical problem sets; multiple programming languages; final project; free access; suitable even without prior CS experience.

Eligibility: open to everyone, including high school students; Harvard enrollment is not required. No prior programming experience is required. To earn a CS50 Certificate, students must complete the required coursework and meet the passing requirements. A verified certificate is available through edX. No recommendation letter, motivation essay or interview is required.