Foundation

Computer Science

Lecture courses, references, and rankings covering the fundamentals — algorithms, systems, and the theory underneath it all.

MIT OpenCourseWare — Computer Science Free lecture notes, exams, and videos from MIT's undergraduate and graduate CS courses.

Stanford Online Lectures Full course recordings from Stanford covering ML, algorithms, systems, and more.

NPTEL — IIT & IISc Lectures National Programme on Technology Enhanced Learning — rigorous courses from India's top institutes.

Khan Academy Foundations in math, logic, and computing — great for building intuition from first principles.

GeeksForGeeks Comprehensive CS fundamentals, data structures, algorithms, and system design references.

CS University Rankings Research-output based rankings of computer science programs worldwide.

The Algorithms — Open Source Community-maintained algorithm implementations in every major language.