<p>CS50 is Harvard University's introduction to computer science and programming, taught by Prof. David J. Malan on edX (HarvardX). It is Harvard's largest course and a widely recommended first course for students considering computer science.</p><ul><li>Covers algorithmic thinking, problem-solving, and programming in C, Python, SQL, JavaScript, HTML, and CSS</li><li>Topics include abstraction, data structures, encapsulation, resource management, security, software engineering, and web development</li><li>Approximately 12 weeks of study, self-paced</li><li>Open to all; no prior programming experience required</li><li>Audit track is free; optional verified certificate available for a fee</li></ul><p>Good entry point for students interested in computing, software engineering, or related A-Level / polytechnic pathways.</p>